Questions from Business Statistics

Q: The median number of part-time employees at fast-food

The median number of part-time employees at fast-food restaurants in a particular city was known to be 18 last year. City officials think the use of part-time employees may be increasing. A sample of...

Q: Refer to exercise 48. Assume the firm selects a sample of

Refer to exercise 48. Assume the firm selects a sample of 50 surveys and repeat parts (b) and (c). What observation can you make about how increasing the sample size affects the probability of making...

Q: A large corporation sends many of its first-level managers to

A large corporation sends many of its first-level managers to an off-site supervisory skills training course. Four different management development centers offer this course. The director of human res...

Q: The better-selling candies are often high in calories. Assume

The better-selling candies are often high in calories. Assume that the following data show the calorie content from samples of M&€™s, Kit Kat, and Milky Way candies. Test for significant...

Q: Consider the following set of rankings for a sample of 10 elements

Consider the following set of rankings for a sample of 10 elements. a. Compute the Spearman rank-correlation coefficient for the data. b. Use α = .05 and test for significant rank corr...

Q: Consider the following two sets of rankings for six items.

Consider the following two sets of rankings for six items. Note that in the first case the rankings are identical, whereas in the second case the rankings are exactly opposite. What value should you...

Q: The following data show the rankings of 11 states based on expenditure

The following data show the rankings of 11 states based on expenditure per student (ranked 1 highest to 11 lowest) and student–teacher ratio (ranked 1 lowest to 11 highest). a. Wha...

Q: A national study by Harris Interactive, Inc., evaluated the top

A national study by Harris Interactive, Inc., evaluated the top technology companies and their reputations. The following shows how 10 technology companies ranked in reputation and how the companies r...

Q: The rankings of a sample of professional golfers in both driving distance

The rankings of a sample of professional golfers in both driving distance and putting are shown. What is the rank correlation between driving distance and putting for these golfers? Test for significa...

Q: A student organization surveyed both current students and recent graduates to obtain

A student organization surveyed both current students and recent graduates to obtain information on the quality of teaching at a particular university. An analysis of the responses provided the follow...