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New car owners are currently keeping their cars for an average (mean) of 6.5 years with a standard deviation of 2.4 years. You have sampled 39 owners of new Mercedes Benz and found a mean length of ownership of 7.1 years. How do I Test to determine if Mercedes' owners hold onto their car longer than the average for all brands using α = 0.01 and the prob-value approach?
testing equality of variances.over the last several years the use of cell phones has increased dramatically. according
A thorough examination reveals there is nothing wrong with the filling machine. From a statistical standpoint, was there a "type" error made? If yes, which type? Explain.
Find the margin of error for the 95% confidence interval used to estimate the population proportion. In a survey of 7100 T.V. viewers.
Comment on any problems you see with the use of the mean and standard deviation as summary statistics.- How well do you think the Normal model will work on these data? Explain.
Discuss the burden placed on people or organizations contacted as references for job candidates. How do organizations cope with this burden?
All three wines are produced in the optimal solution. How little would the profit for Blanc have to be for it to no longer be produced?
A television network earns $2.5 million dollars each season for a hit program and loses $0.5 million each season for a flop. Ingeneral, 19% of the programs are considered hits and 81% of the programs are flops. If the network does not make anyprog..
A committee of size k is chosen from a group of n women and m men. All possible committees of size k are equally likely.
Find the probability that the mean aptitude test score for a randomly selected group of 150 8th graders is between 98 and 102.
What is the level L (±0.0001) such that the probability that the average NOX level for the fleet is greater than L is only 0.03?
correlation concerns the relationship between the values of variables. regression analysis determines the nature of
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.
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