# Question

The human resource (HR) director of a large corporation wishes to study absenteeism among its mid- level managers at its central office during the year. A random sample of 25 mid- level managers reveals the following:

• Absenteeism: X-bar = 6.2 days, S = 7.3 days.

• 13 mid- level managers cite stress as a cause of absence.

a. Construct a 95% confidence interval estimate for the mean number of absences for mid- level managers during the year.

b. Construct a 95% confidence interval estimate for the population proportion of mid- level managers who cite stress as a cause of absence. Suppose that the HR director wishes to administer a survey in one of its regional offices. Answer these questions:

c. What sample size is needed to have 95% confidence in estimating the population mean absenteeism to within ± 1.5 days if the population standard deviation is estimated to be 8 days?

d. How many mid- level managers need to be selected to have 90% confidence in estimating the population proportion of mid- level managers who cite stress as a cause of absence to within ± 0.075 if no previous estimate is available?

e. Based on (c) and (d), what sample size is needed if a single survey is being conducted?

• Absenteeism: X-bar = 6.2 days, S = 7.3 days.

• 13 mid- level managers cite stress as a cause of absence.

a. Construct a 95% confidence interval estimate for the mean number of absences for mid- level managers during the year.

b. Construct a 95% confidence interval estimate for the population proportion of mid- level managers who cite stress as a cause of absence. Suppose that the HR director wishes to administer a survey in one of its regional offices. Answer these questions:

c. What sample size is needed to have 95% confidence in estimating the population mean absenteeism to within ± 1.5 days if the population standard deviation is estimated to be 8 days?

d. How many mid- level managers need to be selected to have 90% confidence in estimating the population proportion of mid- level managers who cite stress as a cause of absence to within ± 0.075 if no previous estimate is available?

e. Based on (c) and (d), what sample size is needed if a single survey is being conducted?

## Answer to relevant Questions

A national association devoted to HR and workplace pro-grams, practices, and training wants to study HR department practices and employee turnover of its member organizations. HR professionals and organization executives ...The manufacturer of Ice Melt claims that its product will melt snow and ice at temperatures as low as 0° Fahrenheit. A representative for a large chain of hardware stores is interested in testing this claim. The chain ...If you use a 0.05 level of significance in a two- tail hypothesis test, what decision will you make if ZSTAT = - 0.76? Suppose that in Problem 9.16, the standard deviation is 0.012 gallon. a. Repeat (a) through (d) of Problem 9.16, assuming a standard deviation of 0.012 gallon. b. Compare the results of (a) to those of Problem 9.16. The file FastFood contains the amount that a sample of fifteen customers spent for lunch ($) at a fast- food restaurant: a. At the 0.05 level of significance, is there evidence that the mean amount spent for lunch is ...Post your question

0