Okun NAME:_________________________
Homework Assignment #8: Pearson Correlation Coefficient
1 [C]. For the data below, is the relationship between X and Y
linear?
X Y
3 90
6 70
9 50
12 70
15 90
2 [C]. Which letter of the English alphabet does a scatter plot
of these pairs of scores look like? _____
3 [C]. Given the type of relationship between X and Y identified
above, what will be the value of the Pearson r? ______
4 [C]. In a study of the correlation between father’s income
and son’s income, father’s income is the __________ and son’s
income is the _________ ___________ .
5 [C]. Which type of correlation coefficient is appropriate in
each of the following situations?
A. To examine the relationship between parental divorce (yes or
no) and diagnosis of being clinically depressed (yes or no).
____________
B. To examine the relationship between class rank and order of
finish in the school’s science fair competition.
___________
C. To examine the relationship between age and highway driving
speed.
_________________
6 [C]. Power is the probability of _________ a _____ null hypothesis.
7 [C]. In which of the following scenarios would the researcher have the most power?
A. A = -.7, n = 100, and = .01
B. A = +.6, n = 100, and = .05
C. A = -.7, n = 90, and = .05
D. A = -.7, n = 100, and = .05
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