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Category > Statistics Posted 06 Jun 2017 My Price 5.00

Senior management of a consulting services firm is concerned

Statistic questions

Senior management of a consulting services firm is concerned about a growing decline in the firm’s weekly number of billable hours. The firm expects each professional employee to spend at least 40 hours per week on work. In an effort to understand this problem better, management would like to estimate the standard deviation of the number of hours their employees spend on work-related activities in a typical week. Rather than reviewing the records of all the firm’s full-time employees, the management randomly selected a sample of size 51 from the available frame. The sample mean and sample standard deviations were 48.5 and 7.5 hours, respectively.

 

Construct a 99% confidence interval for the standard deviation of the number of hours this firm’s employees spend on work-related activities in a typical week.

 

Question 2

As a general rule, the normal distribution is used to approximate the sampling distribution of the sample proportion, , only if the sample size n is greater than 30.

I believe the answer to be true

Answers

Alpha Geek
(8)
Status NEW Posted 06 Jun 2017 02:06 PM My Price 5.00

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