601hw08 - Statistics 601 Assignment 8 due Friday 4 November...

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Statistics 601 - Assignment 8 due Friday, 4 November 2016 As always, do not turn in unedited computer output for problems worked on a computer. Cut/paste the relevant plots and/or tables and include them into your interpretation as if you were writing a technical report. Provide only material that supports your answers. 1. Read the second part of the article “The ASA’s Statement on p - Values” (the actual statement you can read the first part about how it came to be, if you like). It has been posted in eCampus. Answer the following. a) Which of the six principles surprised or interested you the most? What did you learn that you had not realized before? b) In our class we have talked a lot about getting estimates and their standard errors and using them to obtain confidence intervals. How does getting confidence intervals help with some of the issues that come from relying on p -values? 2. Use the data from Exercise 10 22 ( pipes.csv ) to answer the following. a) Using the two-sample t -test (with equal variances assumed), test the hypothesis that the mean deflection temperature is different for the two types of plastic pipe. b) Thinking of this as a one-way classification model (with a = 2), compute the mean squares for model and error directly from the sample means and variances.
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