Question 1
5 out of 5 points
If the correlation between variables X and Y is 0.95, which of the following is true?
Question 2
5 out of 5 points
In the equation Y = bX + a, X and Y are _________.
Question 3
5 out of 5 points
The closer the points on a scatter diagram fall to the regression line, the _________ between the scores.
Question 4
5 out of 5 points
If one takes a sample of pairs of points over a narrow range of X or Y scores, what effect might this have on the value of r?
Question 5
5 out of 5 points
For the following X and Y scores, how much of the variability of Y is accounted for by knowledge of X? Assume a linear relationship.
X
20
15
6
10
Y
6
5
4
0
Question 6
5 out of 5 points
After several studies, Professor Smith concludes that there is a zero correlation between body weight and bad tempers. This means that _________.
Question 7
0 out of 5 points
In a perfect relationship, _________.
Question 8
5 out of 5 points
If a correlation is perfect,
Question 9
5 out of 5 points
You have conducted a brilliant study which correlates IQ score with income and find a value of r = 0.75. At the end of the study you find out all the IQ scores were scored 10 points too high. What will the value of r be with the corrected data?
Question 10
5 out of 5 points
Which of the following statements is true?
Question 11
5 out of 5 points
It is possible to compute a coefficient of correlation if one is given _________.
Question 12
5 out of 5 points
Correlation implies causation.
Question 13
5 out of 5 points
What is the slope for the points X1 = 30, Y1 = 50 and X2 = 25 and Y2 = 40?
Question 14
5 out of 5 points
Pearson r is _______.
Question 15
5 out of 5 points
Y can be most accurately predicted from X if the correlation between X and Y is _________.
Question 16
5 out of 5 points
Rho is used _________.
Question 17
5 out of 5 points
Which of the following is (are) not correct interpretations of Pearson r?
Question 18
5 out of 5 points
In a positive relationship, _________.
Question 19
5 out of 5 points
The proportion of variance accounted for by a correlation between two variables is determined by _________.
Question 20
5 out of 5 points
Which of the following is (are) not correlation coefficients?
