QUESTION 37

In determining the best companies to work for, a number of variables are considered, including size, average annual pay, and employee turnover rate. Moreover, employee surveys are conducted to assess aspects of the organization's culture, such as trust and openness to change. In an attempt to determine what affects turnover rate, a sample of 33 companies was randomly selected, and data were collected on the average annual bonus and turnover rate (%) for 2008. In addition, a questionnaire was administered to the employees of each company to arrive at a trust index (measured on a scale of 0-100). Below are the multiple regression results.

Predictor

Coef

SE Coef

T

P

R-square

Constant

12.1005

0.7826

15.46

0.000

79.6%

Trust Index

-0.07149

0.01966

-3.64

0.001

Average Bonus

-0.0007216

0.0001481

-4,87

0.000

The correct null hypotheses for testing the regression coefficient of Trust Index (TI) is

TI 0

TI > 0

TI = 0

TI < 0

1 points

QUESTION 38

The cost of a university education has increased at a much faster rate than costs in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average number of hours students work per week exceeds 20. A random sample of 20 students was selected and the following values were observed:

26

15

10

40

10

20

30

36

40

0

5

10

20

32

16

12

40

36

10

0

At Alpha = 0.05

we fail to reject the null hypothesis, and there is no evidence to suggest that students work more than 20 hours per week.

we reject the null hypothesis.

we support the alternative hypothesis; there is strong evidence to suggest that students work more than 20 hours per week.

we know students work more than 20 hours per week, on average.