5 stats Questions:

1. A group of four participants obtain the following scores on a test: 2, 3, 1 and 6 respectively. What is the mean of the group? pick one below:

a. 3

b. 4

c. 12

2. A researcher wants to study the relationship between discourse coherence and age. He collects data and after analyzing them he finds a correlation of -.66 (r = -.66). This means that: Pick one below:

a. As age increases, discourse coherence increases.

b. As age decreases, discourse coherence decreases.

c. As age increases, discourse coherence decreases.

3. A correlation of -.90 (r = -.90) is stronger than a correlation of .30 (r = .30).

True or False ?

4. In a study, alpha is set to .05 and p = .001. Should we reject the null hypothesis?

a. Yes

b. No