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Using Microsoft Excel, create a correlation analysis of Wal-Mart's annual net income over the past 10 years compared with Sears's annual net income over the past 10 years and interpret the results.
Do both companies' net incomes fall during a recession?
Using Microsoft Excel, create a multiple regression equation that explains Wal-Mart's annual net income and interpret the results.
Using Microsoft Excel, create a multiple regression equation that explains Sears's annual net income and interpret the results.
You create a 95% confidence interval for your average score and it is (76.347, 79.133). Given this information, what is the best conclusion?
Suppose that you're the Quality Manager for the Emerson D. Meritz Machine Tool Company. Your model IE566 grinding machine is afflicted by three types of defects classified as major (type A), serious (type B) and minor (type C).
Is it sensible to conclude that this set of n=16 people is not representative random sample of registered voters?
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
You listen to radio station for 1 hour, at arbitrarily selected time, and carefully observe that amount of advertising time is equal to 7 minutes. Compute z-score for this amount of advertising time.
The quality control department of Widgets Manufacturing needs your help. They can't decide which significance level is appropriate for testing the claim that fewer than 50% of widgets from a production run are defective.
Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table...
Based on our poll what is the margin of error of the proportion of voters favoring the incumbent?
A personality psychologist conducts a study to examine the relationship between extraversion and the number of siblings in a household.
What fraction of the calls last between 4.2 and 5 minutes?
The Executive Camera Company provides full expenses for its sales force. When attempting to budget automobile expenses for its employees, the financial department uses mileage figures to estimate gas, tire, and repair expenses.
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