Questions from Business Statistics

Q: Consider a day when the Dow Jones Industrial Average went up 149

Consider a day when the Dow Jones Industrial Average went up 149.82 points. The following table shows the stock price changes for a sample of 12 companies on that day. a. Compute the sample variance...

Q: The competitive advantage of small American factories such as Tolerance Contract Manufacturing

The competitive advantage of small American factories such as Tolerance Contract Manufacturing lies in their ability to produce parts with highly narrow requirements, or tolerances, that are typical i...

Q: Use the sample data below to test the hypotheses H0:

Use the sample data below to test the hypotheses H0: p1 = p2 = p3 Ha: Not all population proportions are equal where pi is the population proportion of Yes responses for population i. Using a .05 leve...

Q: The following table contains observed frequencies for a sample of 240.

The following table contains observed frequencies for a sample of 240. Test for independence of the row and column variables using α = .05.

Q: Annual starting salaries for college graduates with degrees in business administration are

Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $45,000 and $60,000. Assume that a 95% confidence interval estimate of the p...

Q: A Bloomberg Businessweek subscriber study asked, “In the past 12

A Bloomberg Businessweek subscriber study asked, “In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?” A se...

Q: A Deloitte employment survey asked a sample of human resource executives how

A Deloitte employment survey asked a sample of human resource executives how their company planned to change its workforce over the next 12 months. A categorical response variable showed three options...

Q: A J. D. Power and Associates vehicle quality survey asked

A J. D. Power and Associates vehicle quality survey asked new owners a variety of questions about their recently purchased automobile. One question asked for the owner’s rating of th...

Q: The Wall Street Journal Annual Corporate Perceptions Study surveyed readers and asked

The Wall Street Journal Annual Corporate Perceptions Study surveyed readers and asked how they rated the quality of management and the reputation of the company for more than 250 worldwide corporation...

Q: The race for the 2013 Academy Award for Actress in a Leading

The race for the 2013 Academy Award for Actress in a Leading Role was extremely tight, featuring several worthy performances. The nominees were Jessica Chastain for Zero Dark Thirty, Jennifer Lawrence...