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QuestionQuestion 15 out of 5 points

04 May QuestionQuestion 15 out of 5 points

Posted at 09:16h in Uncategorized by
Question

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?

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