A correlation between college entrance exam

A correlation between college entrance exam grades and scholastic achievement was found to be -1.08. On the basis of this you would tell the university that _________.

Question 2

5 out of 5 points

In the equation Y = bX + a, X and Y are _________.

Question 3

0 out of 5 points

A traffic safety officer conducted an experiment to determine whether there is a correlation between people’s ages and driving speeds. Six individuals were randomly sampled and the following data were collected.

Age

20

25

45

46

60

65

Speed (mph)

60

47

55

38

45

35

The value of Pearson r equals _________.

Question 4

0 out of 5 points

In a negative relationship, _________.

Question 5

0 out of 5 points

Knowing nothing more than that IQ and memory scores are correlated 0.84, you could validly conclude that _________.

Question 6

5 out of 5 points

If two variables are ratio scaled and the relationship is linear, what type of correlation coefficient is most appropriate?

Question 7

0 out of 5 points

The proportion of variance accounted for by a correlation between two variables is determined by _________.

Question 8

5 out of 5 points

If N is small, an extreme score _________.

Question 9

0 out of 5 points

It is possible to compute a coefficient of correlation if one is given _________.

two sets of measurements on the same individuals

Question 10

5 out of 5 points

A scatter plot _________.

Question 11

0 out of 5 points

Causation implies correlation.

 

Question 12

0 out of 5 points

Which of the following values of r represents the strongest degree of relationship between two variables?

Question 13

0 out of 5 points

If 49% of the total variability of Y is accounted for by X, what is the value of r?

Question 14

0 out of 5 points

A researcher wanted to know if the order in which runners finish a race is correlated with their weight. She conducts an experiment and the data are given below.

Finishing order

1

2

3

4

5

6

Weight (lbs)

110

114

112

108

116

113

The correlation for these data equals _________.

Question 15

0 out of 5 points

What is the value of the Spearman rank order correlation coefficient (rho) for the following pairs of ranks?

Question 16

0 out of 5 points

If the correlation between variables X and Y is 0.95, which of the following is true?

Question 17

5 out of 5 points

In a perfect relationship, _________.

Question 18

0 out of 5 points

Which of the following statements concerning Pearson r is not true?

Question 19

0 out of 5 points

In the equation Y = bX + a, X and Y, b is _________.

Question 20

0 out of 5 points

Y can be most accurately predicted from X if the correlation between X and Y is _________.