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Shaver Manufacturing, Inc., offers dental insurance to its employees. A recent study by the human resource director shows the annual cost per employee per year followed the normal probability distribution, with a mean of $1,280 and a standard deviation of $420 per year.
What fraction of the employees cost more than $1,500 per year for dental expenses?
What fraction of the employees cost between $1,500 and $2,000 per year?
Estimate the percent that did not have any dental expense.
What was the cost for the 10 percent of employees who incurred the highest dental expense?
An independent financial advisor claims an average rate of return, μ, on a particular investment is at least 7%. In testing her claim, the correct pair of hypotheses is:
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Select the suitable hypothesis.H 0 : π ≥ .052; H 1 : π 0 if z
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The trend line y = 0.70 + 0.005t was calculated from quarterly data for 1999 -2003, where t = 1 for the first quarter of 1999. The seasonal indexes computed from the trend line for the four quarters of the year 2004 were .85, 1.05, 1.15, and .80, ..
In a regression model involving 30 observations, the following estimated regression equation was obtained:
The management of a chain of fast food restaurants wants to investigate the relationship between the daily sales volume (in dollars) of a company restaurant and the number of competitor restaurants within a 1 mile radius. The following data have b..
Out to right, create a 90% confidence interval estimate of sigma (σ), population standard deviation.
Determine the critical path and project completion time.
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