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As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh. A sample of 35 Cincinnati employees showed they travel a mean of 370 miles per month, with a standard deviation of 30 miles per month. A sample of 40 Pittsburgh employees showed they travel a mean of 380 miles per month, with a standard deviation of 26 miles per month. At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees? Use the five-step hypothesis-testing procedure.
A committee of three is selected at random from a set consisting of five Democrats, eight Republicans, and two Independents.
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
The probability that the daily demand at this store is at least one and at most three is:
To determine whether there exists mean difference among the groups:
What control limits should be applied to his sample?
Extra college-level training, and rest of the sailors arn't accounted for. How does your sample compare to what you expected to determine? Define null hypothesis.
What is the optimal strategy for producing 500 tons of newsprint pulp, 600 tons of packaging pulp, and 300 tons of print stock quality pulp at minimum cost?
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
Describe the sampling distribution of the sample proportion
Given 7 male individuals in a Physical Education course, the number of sit ups each individual can do in a one minute period was recorded:
Part 1. What is the appropriate distribution for such data? Part 2. Is this lot anomalous?
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