By calculating the percentage of error, you can compare the estimated value with the exact value. The error percentage provides you with the percentage difference between the estimated value and the exact value, which helps you to know how close the estimated value is to the exact value. If you want to know how to calculate the error percentage, you only need to know the estimated value and the exact value. Here's how to do this:
Suppose that the cells of input data are A 1, A2, A3, and the percentage is displayed in B 1-B3: Set the cell format of B 1-B3 as a percentage (right mouse button, drop-down menu "Format Cell"), and enter it in B1:= A/kloc-0.
Step 1: formula for calculating error percentage.
Absolute error = | Indication-standard value | (that is, the absolute value of the difference between the measured value and the real value) Relative error = | Indication-standard value |/real value (that is, the percentage of absolute error to the real value) In addition, there are: systematic errors: errors caused by measuring tools, tools and fixtures. Accidental error: it is caused by the operation of the operator.
The calculation formula of error percentage is simple: [(exact value-estimated value)/exact value] × 100%.
If your data is in column A, please enter = IF (A 1) ",text (ABS (22-A 1)/22," 0.00% ") in B 1.
The estimated value is the measured value, and the accurate value is the theoretical value. Once you get the absolute value of the difference between the estimated value and the exact value, you only need to divide it by the exact value and then multiply the result by 100%.
Accuracy refers to the correct degree of expression or description of a thing, which is used to reflect the correct answer to things. The correct rate is the calculation method of the percentage of the correct number to the total number: correct rate = correct number divided by the total number multiplied by 100%. For example, if 50 questions are answered correctly, the correct rate is 30÷50* 100%=60%, in which% can be used as the unit. Another example is
Step 2: Subtract the estimated value from the exact value.
If your data is in column A, please enter = IF (A 1) ",text (ABS (22-A 1)/22," 0.00% ") in B 1.
For example, the true value is 10 and the estimated value is 9.
In modern mass measurement, weight is the standard measurement tool for mass value transmission. The quality value is based on the original platinum-iridium alloy kilogram preserved by the French International Bureau of Metrology. Countries divide the weight into national kilogram benchmark, national kilogram sub-benchmark, kilogram working benchmark, working benchmark group and various working standards composed of multiples and components of kilograms.
For example: 10-9= 1.
The calculation formula of deviation rate is as follows: deviation rate = (actual value-theoretical value)/theoretical value x 100%. Deviation rate refers to the degree of deviation between the actual value and the theoretical value or estimated value, which is used to characterize the operating performance, experimental effect and the implementation of the project progress. For example, in the error rate of cost estimation, if the expected warehousing quantity in this period accounts for a large proportion of all warehousing, and
Step 3: Divide the result by the exact value.
The formula for predicting the error value is: (A-E)/(E/ 100)= several percent, where the excess is positive and too little is negative, where a represents the measured value and e represents the normal value. Calculation method of prediction error rate: A is the first measurement data, B is the second measurement data, C is the third measurement data, D is the fourth measurement data, and E is the fifth measurement data (a+b+c+d+e)/5= average value.
10 minus 9 equals-1, and then divided by 10 is the exact value.
What is the marking method of allowable error of capacitor capacity? There are three main ways to mark the allowable error of capacitor capacity: (1) Table 1 gives the meaning of each letter. The letters displayed in the table 1 indicate the wrong method. The meaning of each letter is as follows: 2232 means that the capacitance is 22000pF=0.022μF, and the letter Z means that the error is 80%-20%.
For example:-110 =-0.1
Nominal error = (maximum absolute error)/range x 100% absolute error = | indicated value-standard value | (that is, the absolute value of the difference between the measured value and the real value) relative error = | indicated value-standard value |/real value (that is, the percentage of absolute error to the real value) Extended data system error: it is caused by measuring tools and fixtures.
Step 4: Calculate the absolute value of the result.
The relative error percentage is based on the actual measured error/theoretical weight =(54.6-50)/50=4.6/50, instead of using the actual weight of 54.6 to calculate the relative error = | measured value-actual value |/actual value.
Whether a number is positive or negative, its absolute value is its positive part. The absolute value of a positive number is itself, and the absolute value of a negative number is obtained by subtracting the negative sign.
For example, A and B are two numbers, and A-B=x (difference). If the error of your calculation is y, (y-x)/x(y minus x divided by x to see if the conditions are met, exceeding 15%) details ~ friends.
For example: |-0. 1|=0. 1.
Generally speaking, the calculation of reference error is used as the accuracy level, excluding measuring tools. Quotation error = absolute error divided by upper limit percentage. (Absolute error = measurement result-agreed true value)
Step 5: Multiply the result by 100.
Look at what is written on the pre-sale contract of commercial housing, and then look at the area written on the real estate license. The two ratios are not within 3%.
Just multiply the result by 0. 1 100. This translates into a percentage answer. Just put a percent sign after the answer and you're done.
What is the marking method of allowable error of capacitor capacity? There are three main ways to mark the allowable error of capacitor capacity: (1) Table 1 gives the meaning of each letter. The letters displayed in the table 1 indicate the wrong method. The meaning of each letter is as follows: 2232 means that the capacitance is 22000pF=0.022μF, and the letter Z means that the error is 80%-20%.
For example:. 1x 100 = 10%
How to find the relative error? Let me answer the percentage error. Share and scan the net. Please try again later. You can select the following 1 or more keywords to search for relevant information. You can also be direct.
It is suggested that some teachers like to round the error percentage to a certain place, and most people will think that rounding the error percentage to three significant figures is better.
| C-A | = 0.6 | C-B | = 0.3 | B-A | = 0.3(A+B+C)/3 = = 1.5(0.3+0.3+0.6)/3 = 0.40 . 4/ 15 = 0.8/30 = 0.027 = 2.7%
After further reading, you may be interested in the following.
How to calculate the percentage error?
No, 8 plus or minus 5% is 8-5% ~ 8+5% = 8-0.05 ~ 8+0.05 = 7.95 ~ 8.058.4-7.6. If it exceeds this range, the standard of the measuring system is 50, which is called 53.9. How is this error percentage calculated by asking God for help?
(53.9-50)÷53.9=7.2% Ask thank you, and then ask why some people say to use 3.9 to go to ÷50? Answer this relative error and see who it is relative to. 53.9 has an error, so how to calculate the deviation rate from 53.9?
The calculation formula of deviation rate is as follows: deviation rate = (actual value-theoretical value)/theoretical value x 100%. Deviation rate refers to the degree of deviation between the actual value and the theoretical value or estimated value, which is used to characterize the operating performance, experimental effect and the implementation of the project progress. For example, in the error rate of cost estimation, if the expected warehousing quantity accounts for a large proportion of all warehousing in this period, and the expected warehousing cost deviates greatly from the actual cost (higher than the actual cost), it indicates that there is something wrong with the operation. The solution is: the planned cost during estimation can only be equal to the actual cost; The warehousing and reimbursement time can only be shortened. If there is a big deviation, the income tax should be adjusted for the difference transferred to the next year. How to calculate prediction error and prediction error rate
The formula of the prediction error value is: (A-E)/(E/ 100)= several percent, where the excess is positive and too little is negative.
Where a stands for measured value and e stands for normal value.
Calculation method of prediction error rate;
A is the first measurement data, B is the second measurement data, C is the third measurement data, D is the fourth measurement data and E is the fifth measurement data.
(a+b+c+d+e)/5= average.
Average/100= percentage of average.
Extended data
Error classification:
1, model error:
In the process of establishing mathematical model, it is often necessary to ignore the influence of some secondary factors and simplify the problem, so as to abstract complex phenomena into a mathematical model. Therefore, there is a certain error between the mathematical model and the actual problem, which is called model error.
2. Measurement error
The data used in modeling and concrete operation are often obtained through observation and measurement. Because of the accuracy, these data are generally approximate, that is, there is an error, which is called measurement error.
3. Truncation error
Because the actual operation can only complete the finite term or finite step operation, it is necessary to limit some operations that need to be carried out with limit or infinite process, and truncate the infinite process, so the resulting error becomes truncation error.
4. Rounding error
In the process of numerical calculation, due to the * reason of calculation tools, some numbers are often rounded, and only the first few digits are kept as approximate values of numbers. This error caused by rounding is called rounding error.
Baidu encyclopedia-prediction error
Baidu Encyclopedia-Error
How to define the percentage of capacitance error?
What is the marking method of allowable error of capacitor capacity? There are three main ways to mark the allowable error of capacitor capacity: (1) Table 1 gives the meaning of each letter. The letters displayed in the table 1 indicate the wrong method. The meaning of each letter is as follows: 2232 means that the capacitance is 22000pF=0.022μF, and the letter Z means that the error is 80%-20%. (2) directly mark the absolute value of the error, such as: 68pF O.2pF, indicating that the capacitance of the capacitor is 68pF and the error is between 0.2pf .. (3) directly indicate the percentage error by numbers. For example, 5 in 0.068/5 means that the error is 5% and% is omitted.