One Sample t Test and Quiz
QUESTION 1
Two researchers (A and B) compute a one-sample t test. For both tests, the mean difference between the sample and value stated in the null hypothesis is 5, but the standard error is smaller for Researcher A. Which test is more likely to result in a decision to reject the null hypothesis?
10 points
QUESTION 2
A researcher selects a sample of 16 women and asks them to rate how important a sense of humor is in someone they want a long-term relationship with. She records scores averaging 1.6±0.8 (M±SD ) on a rating scale from -3 (not important at all) to +3 (very important). Assuming that an average score of 0 is the null hypothesis, test whether or not women find this trait important at a .05 level of significance.
10 points
QUESTION 3
The t distribution is similar to the z distribution except:
10 points
QUESTION 4
Two researchers (A and B) compute a two-independent sample t test. For both tests, the standard error is the same, but the mean difference between the groups is larger for Researcher A. Which test is more likely to result in a decision to reject the null hypothesis?
10 points
QUESTION 5
As a requirement for the t test, researchers compute any type of t test with samples selected from populations in which:
10 points
QUESTION 6
A researcher conducts a study and concludes that a new behavioral health treatment program significantly reduces one’s risk for disease compared with risk levels in the general population (d = -0.64). Interpret the size of this effect.
10 points
QUESTION 7
Which of the following summarizes a t test that was significant and associated with a large effect size?
10 points
QUESTION 8
Is a one-sample t test reported differently for one-tailed and two-tailed tests?
10 points
QUESTION 9
A researcher conducts two t tests. Test 1 is a one-tailed test with a smaller sample size at a .05 level of significance. Test 2 is a one-tailed test with a larger sample size at a .05 level of significance. What do you know about the critical values for each test?
10 points
QUESTION 10
Two researchers (A and B) compute a one-sample t test. For both tests, the standard error is the same, but the mean difference between the sample and value stated in the null hypothesis is smaller for Researcher A. Which test is more likely to result in a decision to reject the null hypothesis?