1 and () are called random phenomena.
A. under certain conditions, the same result always appears.
B. phenomenon of different results
C. under certain conditions, the same result does not always appear.
D. the same result is not always a phenomenon. The following does not belong to the discrete distribution is ().
A. binomial distribution B. Poisson distribution C. Normal distribution D. Hypergeometric distribution
3. The following statistics are not used to describe the dispersion degree of samples ().
A. sample range B. sample variance C. sample mean D. sample standard deviation
4. Some people have studied the relationship between car speed and mileage per liter of gasoline, and the correlation coefficient is 0.27. But they found that the odometer was broken, so it was not allowed, and the speed was 3 kilometers faster, so they revised the odometer and got a new correlation coefficient ().
a.0.35b
5. When a factory produces white cement, it is necessary to determine the cement grade by measuring the compressive strength of the cement produced in each kiln. Generally, the data measured after 28 days of cement curing will prevail. However, it is impossible for cement to be piled up for 28 days before leaving the factory, so the 7-day compressive strength X is considered to predict the 28-day compressive strength Y. According to the statistics of 26 kilns, the following results are obtained: =24. 177, =30.323, l=4 1.566, and lxy=37.3 1.
a.3 1.96b
6. () Inspection is an extension of sampling inspection, which requires taking at most two samples from a batch of products to make a conclusion on whether the batch of products is qualified or not. When it is impossible to judge whether the batch of products is qualified from the first sample, take the second sample, and then determine whether the batch of products is qualified according to the results of the two samples.
A. primary sampling B. secondary sampling C. multiple sampling D. sequential sampling
10, the essence of Shewhart control chart is ().
A. Distinguish between inevitable factors and normal factors
B. Distinguish between accidental factors and abnormal factors
C. Distinguish between inevitable factors and abnormal factors
D. Distinguish between normal factors and abnormal factors
1 1. If the products with high inspection cost are controlled, the most suitable control chart is ().
A.-r control chart b.x-rs control chart c.p control chart d.c control chart
12, process performance index ().
A. Require no contingency factors
B. it is required to be in the state of no major failure.
C. requirements must be under steady-state conditions.
D. it is not required to be under steady state conditions.
13. When making the -r control chart, take the preparatory data, at least () groups.
a. 15b.25c.35d.45
14, only even in the process, so the mutation state caused by no reason is called ().
A.b. Accounting and statistical control status
C. Statistical control status D. Accounting or statistical control status
15, the fault considered when calculating the reliability of product tasks is ().
A. failures that affect the completion of the task during the task.
B. All failures during the service life
C. Faults found during maintenance
D. occasional failure
16 and () are inherent properties of the equipment system.
A. supportability B. maintainability C. reliability D. reliability
17, () is influenced by external resources.
A. Availability B. Inherent availability C. Basic reliability D. Mission reliability
18, environmental stress screening should be ().
A. 100%
B. Sampling
C. determine the test sample size according to the product quality.
D. if the conditions are not met, it can be partially carried out.
19, cars belong to () products, fluorescent tubes belong to () products.
A. Irreparable and repairable
B. repairable, repairable
C. Irrevocable. Irretrievable
D. Repairable and irreparable
20, the important way to improve product reliability is to simplify the design as much as possible under the premise of meeting the performance requirements, the more () the product is more reliable, and at the same time improve the () of each unit that makes up the product.
A. Simple and easy to use
B. Complex reliability
C. simple reliability
D. Complex availability
2 1, () is a tool to analyze quality characteristics (results) and factors (reasons) that may affect quality characteristics.
A. Causality diagram B. pareto chart C. Histogram D. Tree diagram
22. In the process of making pareto chart, in order to grasp the "key minority", the cumulative ratio is usually classified on Pareto diagram, in which the factor between () is the main factor.
a . 0% ~ 60% b . 0% ~ 70% c . 0% ~ 80% d . 0% ~ 90%
23, () can be used to identify existing quality problems and seek their solutions, can also be used to identify potential quality improvement opportunities, widely used in quality improvement activities.
A.pdpc method
B. Tree diagram method
C. network diagram method
D. brainstorming
24, () is to achieve the goal and need to take measures or means, systematically sorting, and draw a chart, in order to clear the focus of the problem, looking for the best means or measures.
A. network diagram B. histogram C. tree diagram D. affinity diagram
25, () is the method of using multidimensional thinking to sort out problems step by step.
A. histogram B. matrix diagram C. network diagram D. Pareto diagram
26, the purpose of the horizontal comparison method is ().
A. It is helpful to recognize the goal and determine the priority of planning, so as to be in a favorable position in the market competition.
B. Used to design a new process or delete an old process.
C. Identify new methods and create new ideas
D sort out the relationship and context of things from the chaotic data and reach an agreement on something.
27. It is advisable that the on-site evaluation results account for () of the total evaluation score of qc group activities.
a.50%b.60%c.70%d.80%
28, four sigma level error is ().
a . 6 120 ppm
29. The difference between the final qualification rate of working procedure and the circulation qualification rate is ().
The pass rate of cycle A fully considers the existence of subprocesses in the process.
B the final qualification rate of the process fully considers the existence of subprocesses in the process.
C the qualified rate of circulation mainly considers the progress of the whole process.
The final qualification rate of D process mainly considers the progress of the whole process.
30, measure the standard of six sigma project can be used (), that is, pay full attention to customer satisfaction and enterprise management, from the customer, finance, enterprise internal process and learning growth four aspects of comprehensive consideration.
A. Balanced growth strategy
B. Balanced scorecard strategy
C. strategy of average weighting method
D. strategy of average index method
Second, multiple-choice questions [***5 questions, 2 points for each question, a total of 10 points]
3 1, the description of binomial distribution is ().
A. repeat the random experiment n times.
B.n experiments are independent of each other.
C. There are only two possible results in each experiment.
D the probability of success in each experiment is p, and the probability of failure is1-p.
E. Experiments must be carried out within a certain period of time, in a certain area or in a specific unit.
32, about the standard normal distribution calculation formula is correct ().
a.φ(a)=p(u
39, can be naturally divided into unit products have ().
A. Part of it
machine tool
C. A certain amount of materials
D. A service
E. cloth, cable and molten iron
40, in the sampling inspection, unqualified refers to any quality characteristics of the unit product does not meet the specification requirements. Usually, when necessary, unqualified products are classified according to their severity, which can be divided into ().
A. Class A disqualification
B. First-class disqualification
C. Class B disqualification and Class C disqualification
D. Second-level disqualification and third-level disqualification
E. class a is unqualified, class b is unqualified, and class c is unqualified.
4 1, in gb/t2828. 1, in the following discussion about inspection level, the correct one is ().
A. The judgments of Grade I, Grade II and Grade III are gradually improved.
B. the judgments of the first, second and third levels are gradually declining.
C for the same test level, when n increases, n/n also increases.
D for the same test level, when n increases, n/n decreases.
E. for the same test level, when n decreases, n/n decreases.
42, GB/T 2828 438+0 delivery rule is ().
A. From normal inspection to suspended inspection B. From strict inspection to normal inspection
C. From normal inspection to relaxation inspection
E. Suspension of inspection
43, in the measurement sampling inspection, there are three ways to determine whether the product characteristic value x is qualified, namely ().
A. given the specification upper limit tu of x, x > tu is regarded as unqualified product.
B. given the specification lower limit tl of x, x < TL is a nonconforming product.
C. given the specification upper limit of x>tu, x > tu is qualified.
D. given the specification lower limit tl of x, x < TL is qualified.
E. given the specification upper and lower limits of x, such as tu and tl, if x > tu or x < TL, it is a nonconforming product.
44, control chart is the quality characteristic value (), used to monitor whether the process is under control, a chart designed by statistical method.
A. Description B. Determination C. Recording D. Evaluation E. Inspection
45, in the case of (), the control chart needs to be re-formulated.
A.this idea is out of line.
B. Environmental change
C, change process parameters or adopt new technology.
D. Personnel and equipment changes
E. change raw materials, spare parts or suppliers.
46, in the process of drawing -r diagram, determine the control object or statistics need to pay attention to ().
A. selecting technically important control objects
B if there is a causal relationship between indicators, it is better to use indicators as reasons for statistics.
C. the control object should be clear and understood and recognized by everyone.
D. controlled objects should be represented by numbers.
E. The controlled object should choose a process that is easy to measure and take measures.
47, a factory in order to improve the quality of its products, decided to adopt spc, factory managers finally decided, first of all, adopt P control chart, the drawing step is ().
A. Acquisition of preliminary data
B. Calculate the unqualified rate of samples
C. calculate the control line of p diagram.
D. track the rate of nonconforming products of each sample.
E. Use
48, product failure according to the failure law can be divided into ().
A. Unexpected failure
B. Inevitable failure
C. Wear failure
D. fatal failure
E. Non-fatal failure
49, reliability and maintainability commonly used quality parameter is ().
A. reliability and reliability function
B. Cumulative fault distribution function
C. failure density function
D. failure rate function
E. storage density function
50, bathtub curve description is correct ().
A. Early failure stage The product failures at this stage are mainly design and manufacturing defects.
B. The product failure rate can be reduced to a low level in the accidental failure stage, which is basically in a stable state and can be approximately considered as a constant.
C. In the wear failure stage, the product failure rate rises rapidly, and the product failure increases or a large number of products are scrapped soon.
D. Wear failure stage is the main working period of products.
E the higher the specified allowable failure rate, the shorter the service life of the product.
5 1. The reliability acceptance test is also a statistical test, and scheme () can be adopted.
A. Randomized trials
B. Sequential testing
C. Timing censoring test
D. Random censoring test
E. Fixed number censoring test
52, reliability test is generally divided into engineering test and statistical test, the following belongs to the engineering test is ().
A. Environmental pressure screening test
B. Reliability qualification test
C. Product performance testing
D. Reliability acceptance test
E. Reliability growth test
55, causality diagram can be used for the following ().
A. Causality analysis
B. Analysis of hypothetical relationship
C. Expressing causality
D. expressing right and wrong
E. Promote problem solving by identifying symptoms, analyzing causes and finding measures.
56, the application steps of brainstorming method can be divided into three stages, these three stages are ().
A. Preparatory cutting
B. the stage of initiating and generating creative thinking
C. fattening period
D. Investigation stage
E. Summary stage
57, when drawing a tree diagram to determine the specific purpose or goal, should pay attention to ().
A. Be good at identifying new means or methods
B. in order to make everyone understand, it is necessary to express the goals or goals in a concise form.
C. In the process of achieving goals and objectives, if there are any constraints, it must be pointed out.
D. When determining goals and objectives, first of all, ask a few "Why?" That is, "why do you want to achieve this goal and goal?"
E after confirming the higher-level goals and objectives, it is necessary to confirm whether the original goals and objectives are appropriate.
58, pdpc method is characterized by ().
A.pdpc method is to grasp the state of the system locally and make local judgment.
B.pdpc method grasps the state of the system from the overall situation, so it can make a global judgment.
The progress of the system can be grasped in chronological order.
D pay close attention to the trend of the system process and grasp the causes of non-ideal state when tracking the system operation.
E. In case of unexpected circumstances, the planned measures can be continuously supplemented and revised.
59. The main difference between QC team and administrative team is ().
A. Different organizational principles
B. The purpose of the activity is different
C. Different ways of organization
D. Different ways of activities
E. the purpose of the organization is different
60, set up a qc team program has ().
A. understand the activities of other qc teams.
B. read the publication about qc team.
C. Talk and communicate with relevant leaders
D. improve the quality of all qc team members.
E. Name the group
6 1, Six Sigma management commonly used measurement standard is ().
A. Sigma Z grade
B. Comprehensive defect number zpu
C. Number of defects per unit dpu
D. First output rate
E. Circulation qualification rate rty
62, dmaic process improvement process includes ().
A. Definition
B. Design
C. measurement measurement
D. Analysis
E. improvement
63, in the process of dmaic m measurement commonly used tools and technologies are ().
A. Brainstorming method
B. Causality diagram
C. Tree diagram
D. Regression analysis
E. failure mode analysis
64, 5w 1h means ().
what
who
C. why
How much (how much)
How to do
Answer:
1 answer: C.
Problem analysis: pay attention to the conditional nature of the stem, which is established under certain conditions.
Answer to question 2: C.
Test analysis: Normal distribution is continuous distribution.
Answer to question 3: C.
Test analysis: There are three statistics used to describe the degree of sample dispersion: sample range, sample variance (sample standard deviation) and sample variation coefficient.
Answer to question 4: B.
Test analysis: Let the car speed be X, and the Y correlation coefficient per liter of gasoline mileage be, when the speedometer is 3 kilometers per hour faster and the corrected speed is X', then the x'=x-3 correlation coefficient becomes, because, therefore, the same lx'x'=l, so R' = R.
Answer to question 5: A.
Problem analysis: Tip: When x=26, the predicted value is (26) = 8.612+0.898× 26 = 31.96.
Answer to question 6: B.
Answer to question 7: B.
Answer to question 8: C.
Answer to question 9: D.
10 answer: B.
Analysis of test questions: the essence of Shewhart control chart, that is, conventional control chart, is to distinguish accidental factors from abnormal factors.
Question 1 1 answer: B.
Analysis of test questions: the application scope of x-rs diagram includes testing products with high cost.
Answer to question 12: d
Problem analysis: pp does not require the process to be calculated in a steady state, which is its remarkable feature.
Question 13 answer: B.
14 answer: C.
Question 15 answer: a.
Question 16 answer: a.
Question 17 answer: a.
Question 18 answer: a.
Answer to question 19: d
Test analysis: cars are repairable products, while fluorescent tubes are unrepairable products.
Answer to question 20: Analysis of question C: An important way to improve product reliability is to simplify the design as much as possible on the premise of meeting performance requirements. The simpler the product is, the more reliable it is, and at the same time, the reliability of each unit that constitutes the product is improved.
2 1 answer to the question: a.
Answer to question 22: C.
Problem analysis: on the arrangement chart, 0% ~ 80% of the factors are Class A factors, that is, the main factors, so the correct answer is C.
Answer to question 23: D.
Answer to question 24: C.
Test analysis: Tree diagram can decompose things or phenomena into tree structure.
Answer to question 25: B.
Answer to question 26: A.
Answer to question 27: B.
Test analysis: the focus of enterprise evaluation should be the authenticity and effectiveness of the audit results, so the results of on-site evaluation should account for 60% of the total results.
Answer to question 28: C.
Answer to question 29: A.
Test analysis:
The difference between the final pass rate of the process and the pass rate of the circulation link is that rty fully considers the existence of sub-processes in the process, that is, hides the factors of the factory. Therefore, item A is correct.
Answer 30: B.
3 1 answer: abcd
Problem analysis: Item E is a description of Poisson distribution.
Answer to question 32: abce
Answer to question 33: Chief Executive
Test analysis: There are two main tasks in the statistics we study.
(1) What is the distribution of the study population; (2) What is the mean, variance (or standard deviation) of this population (distribution)?
Answer to question 34: ab
Analysis of test questions: The effective methods to process samples are graphs and tables, and the functions of samples are constructed.
Answer to question 35: ab
Problem analysis: There are two basic forms of parameter estimation: point estimation and interval estimation. Moment estimation is a method of point estimation, not a basic form of parameter estimation. Bias and unbiasedness are important indicators of the goodness of estimators, and they are not the form of parameter estimation. sequence
Answer to question 36: abcd
Test analysis: The basic steps of hypothesis testing can be divided into five steps.
(1) Establish a hypothesis. (2) Select test statistics and give the form of rejection domain.
(3) Give the significance level σ(4) Determine the critical value C and give the rejection domain W..
(5) It is judged whether the test statistics calculated according to the sample fall into the rejection domain, and if it falls into the rejection domain, it accepts h 1, and if it does not fall into the rejection domain, it accepts h0.
Answer to question 37: cd
Problem analysis: p (0 ≤ x ≤ 2) = φ (2-1)/2-φ (0-1)/2 = φ (0.5)-φ (-0.5) = 2φ (0.5)-1.
Answer to question 38: ab
Problem analysis: Option A is the definition of correlation coefficient, which is correct. Option b is also correct. For option C, if two variables are independent of each other, they must not be linearly related, but two unrelated variables are not necessarily independent of each other. For option d, because the correlation coefficient r is obtained from the sample, even if the two variables are actually uncorrelated, the obtained correlation coefficient r is not necessarily equal to zero.
Answer to question 39: abcd
Problem analysis: There are many naturally formed unit products, such as a part and a machine tool. However, the division of some products is not clear, such as continuous products such as cloth area, cable and molten iron, which are difficult to be divided into unit products.
Answer to question 40: ac
Analysis of test questions: According to the severity of nonconformity, any quality characteristics of unit products that do not meet the specification requirements are divided into: Class A nonconformity, Class B nonconformity and Class C nonconformity.
Question 4 1 answer: ad
Answer to question 42: bcde
Answer to question 43: Abe
Answer to question 44: Basic catalytic decomposition
Answer to question 45: bcde
Answer to question 46: bcde
Answer to question 47: abcd
Problem analysis: e The answer does not belong to any drawing step.
Answer to question 48: ac
Test analysis: According to the failure law, product failure can be divided into early failure, accidental failure and wear failure. According to the consequences of failure, it can be divided into fatal failure and non-fatal failure.
Answer to question 49: abcd
Answer to question 50: abc
Test analysis: the accidental failure stage is the main working time of the product. The higher the allowable failure rate, the longer the service life of the product.
Answer to question 5 1: bce
Answer to question 52: ae
Answer to question 53: abcd
Answer to question 54: ab
Answer to question 55: ace
Test analysis: Causality diagram is a tool to analyze quality characteristics (results) and factors (reasons) that may affect quality characteristics. Can be used in three aspects of ace.
Answer to question 56: abc
Answer to question 57: bcde
Answer to question 58: bcde
Test analysis: dpc method can grasp the state of the system from the whole rather than from the part, so it can make a global judgment. Therefore, item A is incorrect.
Answer to question 59: abc
Test analysis: The main differences between qc team and administrative team are:
(1) The organizational principles are different. Administrative teams and groups are generally established by enterprises from top to bottom according to the requirements of professional division of labor and cooperation and the principle of efficiency, and are grass-roots administrative organizations; Qc group is usually a mass organization formed from bottom to top or from top to bottom based on the scope of activities and the principle of interests and feelings, and has the characteristics of informal organization.
(2) The purpose of the activity is different. The purpose of administrative team activities is to organize employees to complete various production and operation tasks and technical and economic indicators assigned by superiors; Qc group is a group that organizes activities for the purpose of improving people's quality, improving quality, reducing consumption and improving economic benefits.
(3) Different activities. The daily activities of the administrative team are usually carried out within the team; Qc team can be organized within the management team or across teams, departments and workshops to promote activities.
Qc team is also different from the traditional technical innovation team. Although some qc groups are also "trinity" organizations engaged in technological innovation, traditional technological innovation groups focus on tackling key problems with professional technology; Qc group not only has a wider range of topics than technical innovation group, but also emphasizes the application of total quality management theory and methods and scientific activities.
Answer to question 60: abce
Analysis of test questions: The procedure of establishing qc team includes the following steps:
(1) Understand the activities of other qc teams;
(2) Read the publications about qc team;
(3) Talk and communicate with relevant leaders;
(4) (4) The leader of QC team can be elected by the team members themselves, or they can take turns to be responsible. Except for key solution teams, they are generally not appointed by superiors;
(5) In general, the number of teams should be controlled within 10. If there are too many people, you can work in several groups or choose different topics.
(6) Name the group.
Answer to question 6 1: acde
Analysis of test questions: The commonly used measurement indicators in six-fitness horse management include: fitness horse level Z, number of defects per million opportunities dpmo, number of defects per unit dpu, first-time output rate fty, cycle qualification rate rty, etc. They cover all kinds of continuous and discrete measurement data.
Answer to question 62: acde
Test analysis: dmaic process improvement process, that is, defining measurement, analyzing and improving control, so the correct answer is acde.
Answer to question 63: Yes.
Test analysis: pareto chart, Causality Diagram, Scatter Diagram, Process Flow Diagram, Measurement System Analysis, Failure Mode Analysis, Process Capability Index, Sampling Scheme, Horizontal Contrast Method, Histogram, Trend Diagram and Questionnaire are commonly used in the M measurement stage, so the correct answer is be.
Answer to question 64: abce
Problem analysis: What does 5w 1h mean (what), why (who), where (where), when (when) and how (how).