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The administrator of a nursing home would like to do a time-and-motion study of staff time spent per day performing nonemergency tasks. Prior to the introduction of some efficiency measures, the average person-hours per day spent on these tasks was µ = 16. The administrator wants to test whether the efficiency measures have reduced the value of m. How many days must be sampled to test the proposed hypothesis if she wants a test having a =.05 and the probability of a Type II error of at most .10 when the actual value of m is 12 hours or less (at least a 25% decrease from prior to the efficiency measures being implemented)? Assume σ = 7.64.
the image of the public library is constantly changing and their online services continue to grow. usage of the
If you were opening a new business, what kinds of surveys or studies would you want to conduct before investing your time and money? How would you conduct these studies
the weekly salaries of teachers in one state are normally distributed with the mean of 490 and a standard deviation of
based on table please evaluate the mean wait time and throughput rate for the following situations when using
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating the person liked the taste.
which of the following is not an advantage of nonparametric methods over parametric methods?a they can be used when the
Describe a hypothesis upon which the manufacturer might wish to conduct a test concerning the relative effectiveness of the new fertilizer.
What is the underlying variable that indirectly correlates these 2 variables? What other variables could you identify as having an indirect relationship?
An insurance company is trying to determine if there is a significant difference in the average number of sick days that registered nurses and nurse practitioners use per year. The data analysis provided the following output.
Positive sales means positive net earnings for any business, sales have no effect on net revenues and insufficient sales can lead to net losses for some businesses.
Twenty times they sold 6 cars, they never sold 7 cars, three times they sold 8 cars and one time they sold 9 cars. Find the probability that at most 4 cars were sold in a week.
the triton energy corporation explores for and produces oil and gas. company president gail freeman wants to have her
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