Question 8 The correlation between two variables A and B is .12 with a significa

Question

Question 8

The correlation between two variables A and B is .12 with a significance of p < .01. What can we conclude?

a. That variable A causes variable B.

b. That there is a substantial relationship between A and B.

c. All of these.

d. That there is a small relationship between A and B.

Question 9

Which of the following statements about Pearson's correlation coefficient is not true?

a. It can be used on ranked data.

b. It cannot be used with binary variables (those taking on a value of 0 or 1).

c. It can be used as an effect size measure.

d. It varies between -1 and +1.

Question 10

If a correlation coefficient has an associated probability value of .02 then:

a. The hypothesis has been proven.

b. There is only a 2% chance that we would get a correlation coefficient this big (or bigger) if the null hypothesis were true.

c. We should accept the null hypothesis.

d. The results are important.

Explanation / Answer

Solution:

Question 8)

d. That there is a small relationship between A and B.

Question 9)

a. It can be used on ranked data.

Question 10

b. There is only a 2% chance that we would get a correlation coefficient this big (or bigger) if the null hypothesis were true.

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