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Unformatted text preview: problem. (C) Calculate the mean and standard deviation for your sample. (D) Perform a test of the hypotheses H o : = 2.5 versus H a : 2.5 Calculate the P-value. (Include a sketch with the axis labeled and showing the sample mean. Use a significance level , = 0.05, and state your conclusion carefully in terms of GPAs. 2. This question uses the data from problem 1. A) Make a 95% confidence interval for the mean grade point average for all the students. B) Interpret the interval in part A in words about GPAs. C) From the confidence interval in part 2A, what would you conclude about the null hypothesis in problem 1D ? Explain. (You may want to read page 455 in text.) D) From the confidence interval in part 2A, what would you conclude about the statement " the mean GPA for all East campus students with at least 30 credit hours is 2.8" ? GPA data is in the library at the reserve desk and on the website above....
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This note was uploaded on 10/18/2011 for the course STA 2023 taught by Professor Shaw during the Fall '11 term at Valencia.
- Fall '11