Questions from Business Statistics

Q: Test to see if the population mean age for men differs from

Test to see if the population mean age for men differs from that for women.

Q: Test to see if the average annual salary for training level A

Test to see if the average annual salary for training level A differs significantly from that for levels Band C combined.

Q: Your firm is interested in learning more about customers’ purchasing patterns on

Your firm is interested in learning more about customers’ purchasing patterns on its Web site and how they relate to the frequency of online site visits. The probability that a customer’s visit will r...

Q: With your typical convenience store customer, there is a 0.

With your typical convenience store customer, there is a 0.23 probability of buying gasoline. The probability of buying groceries is 0.76 and the conditional probability of buying groceries given that...

Q: Your company sends out bids on a variety of projects. Some

Your company sends out bids on a variety of projects. Some (actually 30% of all bids) involve a lot of work in preparing bids for projects you are likely to win, while the others are quick calculation...

Q: Your marketing department has surveyed potential customers and found that, (

Your marketing department has surveyed potential customers and found that, (1) 27% read the trade publication Industrial Chemistry, (2) 18% have bought your products, and(3) of those who read Industri...

Q: Based on analysis of data from last year, you have found

Based on analysis of data from last year, you have found that 40% of the people who came to your store had not been there before. While some just came to browse, 30% of people who came to your store a...

Q: Do training levels A, B, and C have approximately the

Do training levels A, B, and C have approximately the same number of employees, except for randomness? (To answer this, test whether the percentage of employees at each training level differs signific...

Q: Your firm is being sued for gender discrimination, and you are

Your firm is being sued for gender discrimination, and you are evaluating the documents filed by the other side. Their data set is shown in Table 16.4.5. a. Draw box plots for this data set on the sam...

Q: To understand your competitive position, you have examined the reliability of

To understand your competitive position, you have examined the reliability of your product as well as the reliability of your closest competitor’s product. You have subjected each pr...