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Use a t-test to investigate the claim and assume that the population is normally distributed:
A large university says the mean number of classroom hours per week for full-time faculty is more than 9. A random sample of the number of classroom hours for full-time faculty for one week is listed. At α = 0.05 , test the university's claim.
10.7
9.8
11.6
9.7
7.6
11.3
14.1
8.1
11.5
8.5
6.9
Please show your work in Excel so that I can do similar problems.
In testing the equality of the two means below, what is the test statistic? (Use the unequal variances formula)
A researcher used stepwise regression to create regression models to predict Birth-Rate (births per1000) using five predictors:
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A much larger sample would be needed to estimate the proportion of the U.S. Army's 2.4 million active duty and reserve personnel who approved the repeal than would be needed to estimate the proportion of the Marine Corp's 200,000 personnel who fel..
A machine for making nuts is known to create nuts with a standard deviation in size of 0.20mm. A tradesman is required to adjust the machine to make 49mm nuts.
Provide at least 1 example of how a real company has used each of the following multivariate techniques: factor analysis, multi-dimensional scaling, and cluster analysis.
In which of the following situations is bootstrapping (and other resampling methods) often used and Which of the following is a valid description of the bootstrapping method.
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