A community psychologist measured the average number of hours sleep per night (x) and average number of hours spent on public transportation each day (y) in a random sample of 19 university students. The correlation between x and y was –.12. Therefore, the standard error of zr is ______.
a. 0.25
b. 0.0625
c. 0.5
d. 0.35
Ans: A
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