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Educational statistics is in urgent need of answers.
1. Random sampling methods mainly include:

A. Simple random sampling

C. Stratified sampling

D. Nested sampling method

Full score: 2.5 points

3. The following statements about one-tailed test and two-tailed test are correct:

C. Negative regional differences

E. One-tailed test does not care about the direction of difference, and two-tailed test cares about the direction of difference.

Full score: 2.5 points

4. Probability is defined as:

A. Classical probability

B. Empirical probability

D. statistical probability

E. frequency

Full score: 2.5 points

5. Statistical hypothesis test often make two kinds of mistakes are:

B. the original assumption is correct and rejected.

C. the original assumption is wrong, accept it.

Full score: 2.5 points

Third, true or false questions (a total of 20 questions, a total of 50 points. )

V

1. Even if the data is reliable, two kinds of errors in statistical hypothesis testing are inevitable.

B. correct

Full score: 2.5 points

2. Inferential statistics is the basis of descriptive statistics, and probability theory is the basis of inferential statistics.

B. correct

Full score: 2.5 points

3. The probability of inevitable events is 1.

B. correct

Full score: 2.5 points

4. Binomial distribution is the probability distribution of various possible results in binomial experiments.

B. correct

Full score: 2.5 points

5. Binomial distribution is the theoretical basis of interval estimation of population ratio.

B. correct

Full score: 2.5 points

6. The main application of F test is analysis of variance, so F test and analysis of variance are the same thing.

A. mistakes

Full score: 2.5 points

7. The significance test of the average difference of related samples should consider the degree of correlation between the two samples.

B. correct

Full score: 2.5 points

8. Double population hypothesis test is to test whether the difference between two corresponding population parameters is significant according to the difference between two sample statistics.

B. correct

Full score: 2.5 points

9. The sum of squares between groups refers to the sum of squares of the deviation between the sample average and the population average.

B. correct

Full score: 2.5 points

10.

A. mistakes

B. correct

Full score: 2.5 points

1 1.

A. mistakes

B. correct

Full score: 2.5 points

12.

A. mistakes

B. correct

Full score: 2.5 points

13. If it is inferred that the loss of making the first kind of mistakes in statistics is not great, the significance level can be appropriately reduced.

A. mistakes

B. correct

Full score: 2.5 points

14. Compliance test is to test whether the actual observation time of various data classified by a classification mark is consistent with the theoretical time.

A. mistakes

B. correct

Full score: 2.5 points

15. In sampling design, too large sample size can reduce sampling error, but it may increase negligence error.

B. correct

Full score: 2.5 points

16. A set of data with non-normal distribution. After each number is converted into standard score, its distribution is normal.

A. mistakes

Full score: 2.5 points

17. There is a certain difference between the "significant difference" in the hypothesis test and the "significant effect" in the actual problem.

B. correct

Full score: 2.5 points

18. The principle of randomness means that each individual in the sampled population is independent of each other, and the chances of each individual being drawn are equal.

A. mistakes

Full score: 2.5 points

19. ANOVA is essentially to test the variance difference of each group.

B. correct

Full score: 2.5 points

20. The method used in statistical hypothesis testing is logical reduction to absurdity.

B. correct

Full score: 2.5 points