1. Which of the following statements is incorrect? a. In a one-tailed two-sample t-test, the counter hypothesis is that one expected value is greater than the other. b. A paired two-sample t-test is appropriate when examining the difference between relative proportions.
Please solve 1-3. No need to justify.
1. Which of the following statements is incorrect?
a.
In a one-tailed two-sample t-test, the counter hypothesis is that one
b.
A paired two-sample t-test is appropriate when examining the difference between relative proportions.
2. Which of the following statements is incorrect?
a.
If the sample
b.
The degree of explanation of the corresponding linear regression model can be calculated from the sample correlation coefficient between two variables.
c.
A strong
c.
The more the sample means of the groups differ from each other, the greater the absolute value of the test variable in a two-tailed two-sample t-test.
3.
The connection between preschoolers' sleep quality and television viewing in the evenings is investigated. The study observes the sleep quality of the same group of preschoolers first for a week so that watching TV in the evenings is limited, and later for a week so that watching TV is not limited.
Which of the following non-parametric tests is not appropriate for the situation?
Choose one:
a.
Signed-rank test
b.
Sign test
c.
Rank-sum test
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