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A recent report in BusinessWeek indicated that 20 percent of all employees steal from their company each year. (Round z-score computation to 2 decimal places and your final answers to 4 decimal places.)
If a company employs 50 people, what is the probability that:
(a) fewer than 5 employees steal?
(b) more than 5 employees steal?
(c) exactly 5 employees steal?
(d) more than 5 but fewer than 15 employees steal?
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
A statistical study reported that a drug was effective with a p-value of .042. Explain in words what this tells you.
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
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Using binomial distribution find the probability that 2 or 3 women in a sample of 20 will never be married.
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 3.3 emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution.
You wish to do a community needs assessment survey of a community to find out how much office space is needed by professionals in the community.
A researcher wants to see whether the stress of final exams elevates the blood pressure of freshman women. When they are not under any unusual stress, healthy 18 year olds have a systolic blood pressure that averages mean of 120 mm Hg with a stand..
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A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is
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