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