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An aircraft manufacturer is attempting to determine if the average leg length of the adult male has changed from 44". A sample of 81 men was selected randomly and the average length was found to be 45.5", with a standard deviation of 5.5". Test the null hypothesis that the average leg length of the adult male is 44", at a = 0.05.
Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas
Out to right, create a 90% confidence interval estimate of sigma (σ), population standard deviation.
How would you respond if someone told you that the correlation between education level and salary was 1.27?
Develop a hypothesis to investigate this problem based on the claim of the heat pump manufacturer
Which of the following would have a binomial distribution and evaluate the binomial coefficient
Please share 3 real world examples of problems, which occurred due to the use of secondary data. Be specific about the consequences as well the secondary data used. You may use your own organization or research the net or literature for this one.
What happens to the boundaries for the critical regions?
Prepare an ANOVA table and test the null hypothesis of no linear relationship between the two variables.
Suppose that a random sample of fifteen recently sold houses in a certain city has a mean sales price of $290000 , with a standard deviation of $15,000.
How to do multiple regression using Excel and the Megastat plugin. Students are given step-by-step instructions on how to use the MegaStat plugin for Excel and told why Excel's Data Analysis Toolpak isn't reliable for rigorous statistical analysis..
First-order regression model was fit to data. Part of printout follows?
Test whether the average cycle of sleeping and waking differs significantly from 24 hours.
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