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Consider the following results for two samples randomly taken from two populations.
Sample A Sample B
Sample Size 150 150
Sample Mean 412 405
Sample Std Deviation 128 54
A. At a .01 level of significance, test whether there is a difference between the 2 sample means.
b. Construct a 99 percent confidence interval estimate of the difference between the two sample means.
Please prepare a Regression and Automated Testing Plan for a Course Project. A business letter to the Jonesville Library introducing the contents of the document
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A random sample of the lifetime of 49 UltraIllum light bulbs has a mean of 3,960 hours and a standard deviation of 200 hours. Construct a 95% confidence interval estimate of the mean lifetime for all UltraIllum light bulbs.
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Here are the shopping times (in minutes) for a sample of shoppers at a particular shoe store: 25, 38, 34, 41, 37 and find the standard deviation of this sample of shopping times. Round your answer to at least two decimal places.
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Assume Nick doesn't know how his received he suppose that all three states of nature are equally likely to occur. If Nick uses the equally likely criterion illustrate what decision would he make.
Determine the mean and standard deviation for number of actual voters in groups of 1002.
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