The school held a broadcast gymnastics competition in the grade. The whole grade 10 classes, each class 100 students. It is stipulated that each class should take 100 students to participate in the competition. At this point, the sample size is ().

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Answer d

A city has 100 students taking the exam. In order to understand the examination situation, the scores of 100 students were selected for statistical analysis. In this issue, there are the following three statements:

① A candidate is a sample of the whole population; 2 candidates are the whole; ③ The sample size is

The correct statement is ()

A.0 kinds of B. 1 C.2 kinds of D.3 kinds.

Answer b

① In order to understand the views of the whole school students on teachers, the school conducted a questionnaire survey on the whole school students;

② In order to know the junior high school students' online situation, the Youth League Committee of a city conducted a survey on some students in the junior high school;

③ A class of students plans to organize a spring outing. In order to determine the location of the spring outing, the students were investigated.

In order to know the homework completion of the whole class, an odd number of students were investigated.

In the above survey, it is () that collects data through the census.

A.①③ B.①② C.②④ D.②③

Answer a