Minitab Assignment: Hypothesis Testing for Differences in Means, Assignments of Statistics

Download Minitab Assignment: Hypothesis Testing for Differences in Means and more Assignments Statistics in PDF only on Docsity! Stat 185 Minitab Session 5: Hypothesis Testing During this assignment, you will be using Minitab to perform three hypothesis tests about differences between means. You will have to decide if it is appropriate to consider the samples to be independent or paired, adjust Minitab’s settings to perform the appropriate tests, print the output, and interpret the results. You are going to use Minitab to perform three hypothesis tests from problems on pages 590-592 in the textbook: problems 11.76, 11.88, and 11.89. Entering the Data You might as well enter in all the data at once. Label the first column Loc A and the second column Loc B, and enter the data for problem 11.76 in those columns. Label the third column 1983 and the fourth column 1982 and enter the data for problem 11.88 in those columns. Label the fifth column Before and the sixth column After and enter the data from problem 11.89 in those columns. Performing the Tests For each of the problems, you’ll have to decide whether the samples are independent or paired and perform the appropriate test. The hypothesis tests are under Stat > Basic Statistics. If the samples are independent, you want to choose 2-sample t. If they are paired, you want Paired t. You’ll have to make the appropriate settings to indicate which columns the data is located in. I’d like boxplots to accompany the tests, so you’ll need to select Graphs and make the appropriate settings to get boxplots to go with the hypothesis tests. You’ll have to select Options and make the correct settings. Note: Minitab uses “confidence level” rather than “significance level”, so if .05  the confidence level is .95. In general, the confidence level is 1  . “Test mean” is what we would call the “hypothesized value”. You also need to select the type of alternative hypothesis (not equal, greater than, or less than) that you want Minitab to use. What to Print You should have three pages with boxplots. Use Editor > Edit to put two textboxes at the top of each of these pages. Type your name in a textbox in the upper left, and the problem number in a textbox in the upper right. Print these three pages. Type your name at the top of the session window, and delete any false starts or extraneous information. Your session window should show your name and output for the three hypothesis tests. Print your session window. Use your output to answer the questions on the back of this page. Turn in: 1. This page 2. Session window 3. Boxplot for 11.76 4. Boxplot for 11.88 5. Boxplot for 11.89 (in this order, please)