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Category > Management Posted 08 Jan 2018 My Price 10.00

SS Groups

Refer to Exercises 16.5 and 16.10 about female student height and preferred classroom seating location. Sample sizes, means, and standard deviations by seating location follow.

a. Show calculations verifying that SS Groups is approximately 101.

b. Use the formula SS Error =  that SS Error is approximately 1043.

c. The value of df for error is 150. Find the value of MSE, and find the value of the pooled standard deviation sp.

Exercises 16.10

Refer to Exercise 16.5 about female height and preferred classroom seating location. The following output from Minitab gives confidence intervals for all pairwise comparisons of seating locations. A Tukey procedure with 95% family confidence level was used.

a. What confidence interval is given for the difference between the mean heights of female students who prefer to sit in the back versus those who prefer to sit in the front? Explain whether the interval gives evidence that the population means differ for these two locations.

b. What confidence interval is given for the difference between the mean heights of female students who prefer to sit in the back versus those who prefer to sit in the middle? Explain whether the interval gives evidence that the population means differ for these two locations.

c. What confidence interval is given for the difference between the mean heights of female students who prefer to sit in the front versus those who prefer to sit in the middle? Explain whether the interval gives evidence that the population means differ for these two locations.

Exercise 16.5

For n = 153 female students in the UCDavis2 dataset on the companion website, mean height (inches) by student’s preferred seat location in a classroom is shown in the table below.

a. The p-value is .001 for an F-test that compares the mean heights of female students in the three seating locations. In the context of this situation, what conclusion can be made?

b. Describe how mean height of female students in the data set relates to preferred seating location.

 

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Maurice Tutor
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Status NEW Posted 08 Jan 2018 03:01 PM My Price 10.00

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