America's First Daughter, Summaries of English Literature

Download America's First Daughter and more Summaries English Literature in PDF only on Docsity! Mann-Whitney Rank Sum Test in SPSS STAT 314 The test scores shown in the table below were recorded by two different professors for two sections of the same course. Using the Mann-Whitney Rank Sum Test and a significance level of α = 0.05, determine if the locations of the two distributions are equal (i.e., if the medians are equal). Professor A 74 78 68 72 76 69 71 74 Professor B 75 80 87 81 72 73 80 76 1. Enter the values into one variable and the corresponding sample number (1 for Professor A, 2 for Professor B plus null value) into another variable (see figure, below). Be sure to code your variables appropriately. 2. Next you need to check the similar distribution assumption by checking boxplots of the data. Select “Boxplot…” under the “Legacy Dialogs” section of the “Graphs” menu (see right figure, below). Select “Simple” and “Summaries for groups of cases” before clicking “Define” (see middle figure, below). The variable to be graphed should be “Test Score,” and the category axis should be based upon “Professor” (see right figure, below). 3. Select Analyze  Nonparametric Tests  2 Independent Samples … (see figure, below). 4. Select “Test Score” as the test variable and click “Define Groups…”. For Group 1, enter 1 (Professor A), and for Group 2, enter 2 (Professor B plus null value). Click “Continue” to close the “Define Groups” window. Be sure the “Test Type” selected is Mann-Whitney U, and then click “OK” (see the two figures, below).