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Question: In a random sample of 170 married British couples, the difference between the husband's and wife's ages had a mean of 2.24 years and a standard deviation of 4.1 years.
a. Test the hypothesis that British men are significantly older than their wives, on average. Specify the value of a that you chose to use.
b. Explain what is meant by the use of the term significant in part (a), and discuss how it compares with the everyday use of the word.
An article in the Journal of Business reports the results of an analysis of takeovers of U.S. firms by foreign corporations.
A standard deviation of $1500. at the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees?
Decision making using the Transportation method.
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Assuming that the odds ratios for the two groups, those with zero or one partner and those with two or more partners, are equal (in other words, the number of partners is not an effect modifier), calculate the Mantel-Haenszel estimate of this comm..
Given that other studies show a benefit of computerized brain training, state the null and alternative hypotheses.
A random sample of 48 managers of large hotels has mean X‾= 5.91. The null hypothesis for the researcher's test is?
The golf scores for a school team were normally distributed with a mean of 68 and a standard deviation of three.
Let S = [O, SJ be a sample space containing all pos sible values of the daily quantity demanded of elec tric power for a large midwestern city in the sum mer months. The units of measurement are millions of megawatts, and the ca..
For each player, determine the minimum, the first quartile, the median, the third quartile, and the maximum of their home run totals. Use these results to construct comparative box-and-whisker plots.
Design a randomized groups experiment to test the hypothesis that children who watch an hour-long violent television show subsequently play in a more aggressive fashion than children who watch a nonviolent TV show or who watch no show whatsoever.
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