Author Question: The same test was administered twice to two groups of students. The students were similar in ability ... (Read 93 times)

jilianpiloj · **on:** Jun 20, 2018

The same test was administered twice to two groups of students. The students were similar in ability and achievement. Group I was administered the test on two consecutive days. Group II was administered the test at the beginning and the end of the month. Which groups' test-retest scores will have a lower correlation?

a. I
b. II
c. We cannot infer from the information given.

Question 2

The correlation coefficient of 0.95 between mathematics and physics scores of a group of students means that high performance in mathematics causes high performance in physics.

a. True
b. False