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Assignment | Worksheet SPSS Hypothesis

Added on - 07 Mar 2020

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Module 6 Application Assignment WorksheetSPSS Hypothesis TestingInstructionsFor this assignment, you perform a two-sample independentt-test, an ANOVA, and acorrelation analysis related to the data set that has been utilized in the previous twomodules. Import the data into SPSS or, if you correctly saved the data file from theModule 4 and 5 Assignments, you may open and use that saved file to complete thisAssignment. Type your answers to all questions directly into the worksheet, and pastethe required output at the end of this document.Submit this Application Assignment by Day 7 of Week 11.Research ScenarioA researcher is interested in the effect of a new medication on serum cholesterol, HDLcholesterol, and glycosylated hemoglobin of adults. The researcher randomly selects asample of 40 (20 male and 20 female) participants who have been diagnosed with highcholesterol. Assuring equal distribution of males and females, the participants arerandomly assigned to one of two conditions (or groups): Following pretest measures ofserum cholesterol (chol), high-density lipoprotein cholesterol (HDL), and glycosylatedhemoglobin (glyhb), the experimental group (Group 1) is given the medication for aperiod of 6 months while the control group (Group 2) is given a placebo. After the 6months, chol, HDL, and glyhb are again measured.The posttest data for each participant are provided in the Module 4 ApplicationAssignment Data Set Excel file and can be found in the Module 6 Learning Resources.The codebook for the data provided is as follows:AGEAge in yearsSEX1 = male, 2 = femaleGROUP1 = medication, 2 = placeboCHNG_CHOLchange in cholesterol from pretest to posttestHDLHigh-density lipoprotein at posttestGLYHBGlycosylated hemoglobin at posttest---------------------------------------------------------------------------------------------------------------------Step 1: Import the Microsoft Excel data file into SPSS or use the correct saved SPSSdata file as noted in the instructions above.Step 2: Conduct an independent samples t-test to determine if there is a differencebetween Group 1 (medication) and Group 2 (placebo) in terms of changes in cholesterolvalues. Note that the independent variable is GROUP, and the dependent variable is© 2014 Laureate Education, Inc.Page1of5
CHNG_CHOL. For this analysis, choose a two-tailed test of significance. (Be sure tosave your output.)Step 3: Conduct a between-subjects ANOVA to determine if there is a differencebetween sex (males vs. females) and HDL. Note that the independent variable is SEX,and the dependent variable is HDL. For this analysis, choose a two-tailed test ofsignificance. (Be sure to save your output.)Step 4: Conduct a Pearson correlation to determine if there is a relationship betweenHDL and GLYHB. For this analysis, choose a two-tailed test of significance. (Be sure tosave your output.)Step 5: Review your SPSS output and answer each of the following questions:From the independent samplest-test output:A.What is the mean CHNG_CHOL for Group 1? -5.65B.What is the CHNG_CHOL standard deviation for Group 1? 4.095C.What is the mean CHNG_CHOL for Group 2? -0.45D.What is the CHNG_CHOL standard deviation for Group 2? 1.395E.What is the calculatedt-score (equal variances assumed)? -5.376F.What is the probability that the obtainedt-score was simply due to chance asopposed to actual gender differences [see “Sig (two-tailed)” on output]?0.000G.If the probability associated with the obtainedt-score is<0.05, we assume theresults (difference in mean CHNG_CHOL between groups) are much more likelydue to the effects of the medication than to chance. In other words, we would saythe results are statistically significant. Are the results statistically significant (yesor no)? yes, the results are statistically significant.From the ANOVA output:H.What is the mean HDL for group males? 40.85I.What is the HDL standard deviation for males? 7.788J.What is the mean HDL for group females? 49.30© 2014 Laureate Education, Inc.Page2of5
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