What does the independent t test test assume a there

7. What does the independent t-test test assume?
a. There are no differences between the mean scores.
b. The data are normally distributed
c. The sampling distribution is normally distributed.
d. The means of two sets of scores are correlated.
Ans: C
8. When conducting an independent t-test, what is the dependent variable?
9. Which of the following sentences is an accurate description of the standard error?
10. If you use a paired samples t-test:

11. Which of the following statements about the t distribution is correct?
a. It is skewed.
b. In small samples it is narrower than the normal distribution
c. It follows an exponential curve.
d. As the degrees of freedom increase, the distribution becomes closer to normal
Ans: D
12. The degrees of freedom for the paired samples t-test are:
13. Participants rated their mood score out of 20 before and after listening to Reign in Blood by the
thrash metal band Slayer.
Before Listening to Slayer After Listening to Slayer
5 14
8 5
9 17
4 18
3 8
15 19
12 14
6 16
What are the degrees of freedom for this study?
14. Participants rated their mood score out of 20 before and after listening to Reign in Blood by the
thrash metal band Slayer.
Before Listening to Slayer After Listening to Slayer
5 14

8 5
9 17
4 18
3 8
15 19
12 14
6 16
What is the null hypothesis of this study?