Last Year,during an Investigation of the Time Spent Reading Emails

question 131

Essay

Last year,during an investigation of the time spent reading emails on a daily basis,researchers found that on Monday the average time was 50 minutes.Office workers claim that with the increased spam and junk mail,this time has now increased.To conduct a test,a sample of 25 employees is selected,with the following results: sample mean = 51.05 minutes and sample standard deviation = 14.2 minutes.What is the critical value for α = .05 to test the hypotheses and conduct a test to determine if the null hypothesis can be rejected.

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Definitions:

Margin

The difference between the sales price of a good or service and its cost, expressed as a percentage of the sales price.

Investment Centre

A segment or area of a business responsible for both its revenue and its investments.

Residual Income

The amount of income that exceeds the minimum rate of return or hurdle rate, often used in performance measurement.

Operating Assets

Assets that are used for the core operations of a business, necessary for creating goods or services to be sold.