Introduction to Business Statistics
7th Edition
ISBN: 9781111792374
Author: WEIERS
Publisher: Cengage Learning
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Chapter 8.4, Problem 8.28E
The Temployee Company supplies temporary workers to industry and has found that 58% of the positions it is asked to fill require a knowledge of Microsoft Excel. The firm currently has 25 individuals available who know Microsoft Excel. If TemployeeCompany receives 50 inquiries for temporary workers next week, how likely is it that the company will not have enough Microsoft Excel-skilled people on hand?
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An industrial/organizational psychologist wants to improve worker productivity for a client firm, but first he needs to gain a better understanding of the life of the typical white-collar professional. Fortunately, he has access to the 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by WorldOne Research, which surveyed a sample of 650 white-collar professionals (250 legal professionals and 400 other professionals).
One of the survey questions was, “How many hours do you work at your job on a typical workday?” For the subsample of legal professionals (n = 250), the mean response was M = 9.0 hours, with a sample standard deviation of s = 10.4 hours.
The estimated standard error is sMM = .
Use the following Distributions tool to develop a 99% confidence interval estimate of the mean number of hours legal professionals work on a typical workday.
The psychologist can be 99% confident that the interval from to includes the unknown…
An industrial/organizational psychologist wants to improve worker productivity for a client firm, but fırst he needs to
gain a better understanding of the life of the typical white-collar professional. Fortunately, he has access to the 2008
Workplace Productivity Survey, commissioned by LexisNexis and prepared by WorldOne Research, which surveyed a
sample of 650 white-collar professionals (250 legal professionals and 400 other professionals).
One of the survey questions was, "During the average workday, how many hours do you spend attending meetings?"
For the subsample of legal professionals (n = 250), the mean response was M = 2.0 hours, with a sample standard
deviation of s = 5.1 hours.
The estimated standard error is SM = 0.323.
The psychologist can be 99% confident that the interval from 1.2 to
includes the unknown population mean pu.
An industrial/organizational psychologist wants to improve worker productivity for a client firm, but first he needs to gain a better understanding of the life of the typical white-collar professional. Fortunately, he has access to the 2008 Workplace Productivity Survey, commissioned by LexisNexis and prepared by WorldOne Research, which surveyed a sample of 650 white-collar professionals (250 legal professionals and 400 other professionals).
One of the survey questions was, “How many work-related emails do you receive during a typical workday?” For the subsample of legal professionals (n = 250), the mean response was M = 36.7 emails, with a sample standard deviation of s = 21.2 emails.
The psychologist can be 99% confident that the interval from to includes the unknown population mean µ.
Normally the psychologist will not know the value of the population mean. But consider the (unrealistic) scenario that a census of legal professionals is conducted. The census reveals…
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