Directions: Answer each question completely, showing all your work. Refer to the SPSS tutorials as needed (see all attachments). Copy and Paste the SPSS output into the word document for the calculati
S P S S Tu t o r i a l Wilcoxon Signed- R a n k s Te s t The Wilcoxon Signed-Ranks test is used to test if there is a dif- ference in the levels of an independent variable when the same participant received both treatments (within-groups), but the data does not meet the normality assumption needed for the matched pair’s t-test or the data is at the ordinal level of measurement. To explore the analysis technique in SPSS, we will work through the following example. 01 Example:A study was done on student’s opinions of group work at the beginning and end of the semester. Students were ask to rate the following statement at the beginning of the semester and at the end after the group projects were completed.
Working in groups is the best way to accomplish research.
Students were asked to rate according to the following scale.
Strongly Disagree – Disagree - Neither Disagree nor Agree – Agree - Strongly Agree The goal was to determine if there was a significant change in at- titude toward working in groups from the beginning of the semes - ter to the end. The following data was collected from a class of 20 students.
The first step to the analysis in SPSS is to enter the data into the Data Editor in SPSS.
The data is entered in two columns, one for the Beginning rating and one for the rating at the End of the class. Please review the Data entry tutorial for questions. 02 During the data entry portion, in the vari- able view window, ensure that both vari- ables are set to a Scale level of measure under the Measure column. Start your analysis by clicking on Analyze – Nonparametric Tests – Related Samples . The Nonparametric Tests window will open. It has three tabs at the top. It will start in the Objective tab, the default of Automatically compare observed data to hypothesize will be selected and does not need to be changed. 03 Go to the Fields tab. In this tab, move both the variables into the Test Fields box. Finally, select Run . The output will be displayed in the output v i e w e r. Double click on the Hypothesis Test Summary in the output window, and a pop- up window will open with results that are more detailed. The right side of the screen gives the results to be interpreted. 04 The p-value = .609 (Sig.) is greater than 0.05; therefore, according to the Wilcoxon Signed-Rank test, there is not a statistically significant difference in the rating before or after the class on the students’ opinion on group assignments.
