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A sales manager wants to know if the sales productivity of her east region is greater than the sales productivity of her west region. The results of a sample of 12 salespersons from the east region and 16 salespersons from the west region are shown below. Perform the appropriate hypothesis test using alpha = .05. What can you conclude?
East West65.5 72.183.0 52.373.2 63.383.1 63.371.1 79.976.8 59.769.9 74.886.8 78.274.9 75.970.1 67.960.5 78.072.3 60.063.144.856.465.9
At.05 level of significance, is there evidence to propose that mean life length of the batteries manufactured by this manufacturer is more than 400 hours?
ABC Corp. is a firm with all-equity financing. Its equity beta is .80. The Treasury bill rate is 4 per cent and, and the market risk premium is expected to be 10 per cent. What is ABC's asset(equity) beta?
A paper manufacturer has a production process that operates continuously throughout an entire production shift. The paper is expected to have a mean length of 11 inches, and the standard deviation of the length is 0.02 inches.
Strack, Martin, and Stepper (1988) found that people rated cartoons as funnier when holding a pen in their teeth (which forced them to smile) than when holding a pen in their lips (which forced them to frown). For this study, identify the independ..
Which variable is the independent variable and which is the dependent variable? Write out the regression equation and sketch it on the plot. What percentage of the variability in the defect rate can be explained by differences in volume?
A cereal manufacturer seeks to test their newest product against competitor's. A group of 100 children was asked to measure each brand, and then to express a preference.
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
Analyze the process of statistical quality control and determine which part of the process would be most difficult and what steps could be taken to mitigate the anticipated difficulty.
Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood.
What is 95% confidence interval estimate for average number of years served by all Supreme Court justices?
The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.
Compare the unconditional probability of having the disease to the conditional probability of having the disease given the test says you have the disease.
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