PSY-3301 Chapter 7 MC Quiz (Set 3)

Question 1

5 out of 5 points

If r = 0.4582, sY = 3.4383, and sX = 5.2165, the value of bY = _________.

Question 2

5 out of 5 points

When the relation between X and Y is imperfect, the prediction of Y given X is _________.

Question 3

5 out of 5 points

If the regression equation for a set of data is Y’ = 2.650X + 11.250 then the value of Y’ for X = 33 is _________.

Question 4

5 out of 5 points

There is ________ between the sY½X and r.

Question 5

5 out of 5 points

S (Y – Y’) equals _________.

Question 6

5 out of 5 points

If the correlation between two sets of scores is 0 and one had to predict the value of Y for any given value of X, the best prediction of Y would be _________.

.

Question 7

5 out of 5 points

When predicting Y, adding a second predictor variable to the first predictor variable X, will _______.

Question 8

5 out of 5 points

The higher the standard error of estimate is,

Question 9

5 out of 5 points

If = 57.2, = 84.6, and bY = 0.37, the value of aY = _________.

Question 10

5 out of 5 points

In multiple regression, if the second predictor variable correlates highly with the predicted variable, than it is quite likely that _________.

Question 11

5 out of 5 points

A researcher collects data on the relationship between the amount of daily exercise an individual gets and the percent body fat of the individual. The following scores are recorded.

Individual

1

2

3

4

5

Exercise (min)

10

18

26

33

44

% Fat

30

25

18

17

14

If an individual has 22% fat, his predicted amount of daily exercise is _________.

Question 12

5 out of 5 points

The assumption of homoscedasticity is that _________.

Question 13

5 out of 5 points

S (Y – Y’)2 represents _________.

Question 14

5 out of 5 points

Which of the following statements is(are) false?

Question 15

5 out of 5 points

For regression purposes,

Question 16

5 out of 5 points

If bY = 0, the regression line is _________.

Question 17

0 out of 5 points

During the past 5 years there has been an inflationary trend. Listed below is the average cost of a gallon of milk for each year.

1981

1982

1983

1984

1985

$1.10

$1.23

$1.30

$1.50

$1.65

Assuming a linear relationship exists, and that the relationship continues unchanged through 1986, what would you predict for the average cost of a gallon of milk in 1986?

Question 18

5 out of 5 points

The regression equation most often used in psychology minimizes _________.

Question 19

5 out of 5 points

The symbol for the standard error of estimate when predicting Y given X is _________.

Question 20

5 out of 5 points

The primary reason we use a scatter plot in linear regression is _________.