PSY-3301 Chapter 6 MC Quiz (Set 5)

Question 1

5 out of 5 points

In order to properly use rho, the variables must be of at least _______ scaling.

 

Question 2

5 out of 5 points

The lowest degree of correlation shown below is _________.

Question 3

5 out of 5 points

In a negative relationship, _________.

Question 4

5 out of 5 points

Correlation implies causation.

Question 5

5 out of 5 points

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

Question 6

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

What is the appropriate correlation coefficient for these data?

 

Question 7

5 out of 5 points

A relationship can be _________.

Question 8

5 out of 5 points

A correlation of r = 0.60 exists between a set of X and Y scores. If a constant of 10 is added to each score of both distributions, the value of r will _______.

Question 9

5 out of 5 points

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

Question 10

5 out of 5 points

What is the value of r for the following relationship between height and weight?

Height

60

64

65

68

Weight

103

122

137

132

Question 11

5 out of 5 points

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

Question 12

5 out of 5 points

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

Question 13

5 out of 5 points

If one calculates r for raw scores, and then calculates r on the z scores of the same data, the value of r will _______.

Question 14

5 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 Y

20

25

45

46

60

65

Speed X (mph)

60

47

55

38

45

35

The proportion of variability of Y accounted for by X is _________.

Question 15

5 out of 5 points

If a correlation is perfect,

Question 16

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 17

5 out of 5 points

In a positive relationship, _________.

Question 18

0 out of 5 points

If zX equals zY for each pair of points, r will equal _______.

Question 19

5 out of 5 points

In a negative relationship, _________.

Question 20

5 out of 5 points

When a correlation exists, lowering the range of either of the variables will _________.