Category name

I. Multiple choice questions (50%)

1. In the linguistic experiment, if you want to test whether the first-level average of a variable is greater than (or less than) the significance of the second-level average, you should adopt:

(A)z test (b) Bilateral test (c) T test

(d) unilateral test (e) backtracking test

2. In the negative skewness distribution:

(a) The median is greater than the average; (b) The median is below the average.

(c) the average is greater than the mode (d) the median is greater than the mode.

(e) The median is greater than the mode and greater than the average.

3. Which of the following statements is incorrect about random sampling:

(a) Make everyone have an equal opportunity to be extracted; (b) Make the probability of each extraction constant.

(c) Stratified sampling must be adopted; (d) Back sampling must be used.

4. Suppose 80 subjects are assigned to five different experimental condition groups, and investigate the differences of subjects in a certain measurement. What is the df of F ratio?

(A)5 79(B)5 78(C)4 79(D)4 75

5. Population with n 5.N= 10/0, SS=200. The sum of deviations σ (x-μ) is:

14. 14(B)200

(c) There is not enough data to calculate (d) None of the above is correct.

6. In the analysis of variance of repeated measurements, if the average of each group remains unchanged, the differences between the subjects increase:

(a) Differences between groups will be reduced; (b) The variance of the error will be reduced.

(b) it will lower the value of f. (d) The value of f remains unchanged.

7. Which of the following statements is wrong about HSD and Scheffe tests?

(a) Both tests are retrospective tests.

(B)HSD test is more sensitive than Scheffe test.

(C)HSD test can only be used when n is equal.

(d) There is little risk of making Class I mistakes in the Shaff test.

8. Someone wanted to study the influence of a remedial class on TOEFL scores, so he collected the TOEFL scores of 30 high school students after attending the remedial class. For the analysis of the results, the most appropriate statistical method is:

(a) single sample t test (b) one-way ANOVA

(3) Single sample χ2 test (4) Pearson correlation

9. The English test scores of a class obey the normal distribution. The whole class scored 70 points, the standard deviation was 8 points, and one student scored 80 points. His grades are among the best in the class;

(A) 10%(B) 15%(C)20%(D)30%

10. If the correlation coefficient between heredity and ADHD is 0.5, how many variants of ADHD can be explained by variables other than heredity?

(A)5%(B)25%(C)75%(D)75%

Second, the calculation and application problems

1 1. The following are the survey results about sexual openness. The higher the score, the more supportive and open:

Male:10,9,8,8,7; Female: 5, 5, 4, 4. Please: 1) Calculate the correlation coefficient between gender and sexual openness; 2) If there is a significant difference between men and women's attitudes towards sexual openness, which test method should be used? According to the correlation coefficient calculated above, what conclusion should be drawn? 3) Use this hypothesis testing method to verify the previous conclusions. (30%)

12. In the maze experiment of a rat, five rats received three identical treatments (one line for each treatment), and then the time when they walked out of the maze was recorded. Try to complete the analysis of variance table below, and state and test the null hypothesis. (20%)

Source SSdfMS

Processing chamber 44 2

Being processed

Test room 32

Error 1

total