Question 1
1.

Identify the steps in interpreting a regression model. Interpret the following data:
Y = 5.0 + .30X1 where the dependent variable equals turnover intentions for line managers
and the independent variable equals the number of employees supervised
Y = 250 – 4.0X1 where the dependent variable is the number of hits on a new banner ad and
the independent variable is the number of weeks the ad has run

Question 2

1.

Using Case Exhibit 21.1-1 on page 527 in the textbook, formulate a statistical
hypothesis appropriate for the consumer group’s purpose, then calculate the mean average
miles per gallon. Compute the sample variance and sample standard deviation. Determine
the most appropriate statistical test using the 0.05 significance level. Click here to view the
t-distribution table to assist you in solving this problem. Also, refer to the Z-table (Table A.2
in the appendix). Provide your findings in the space provided.

Question 3
1.

Go to page 549 in your textbook and offer a thorough interpretation of question 3.
Interpret the computer cross-tab output, including a Chi-square test. Variable COMMUTE is
“How did you get to work last week?” Variable GENDER is “Are you male or female?”
Comment on the appropriateness of the statistical test used (make sure that your response
includes information on the types of variables used and the scales of measurement).
Describe an alternative approach that may be used.

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