# MGMT 650 Quiz 8.docx - 8 / 8 points The director for Weight...

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8 / 8 pointsThe director for Weight Watchers International wants todetermine if the changes in their program results in betterweight loss. She selected 25 Weight Watcher members atrandom and compared their weight 6 months later to weightat the start of the program. The results are in this excel file:Weight Watchers.xlsx(The weight in the column labeled “After” represents theirweights six months later and “Before” represents their weightat the start of the six-month period.) The director used .05 asthe significance level.Use Excel to test. For each paired difference, compute After –Before. In Data Analysis, t-Test: Paired Two Sample for means,select the After data for Variable 1 Range. Note that thecritical value output by Data Analysis for this test is alwayspositive. In this problem, the sign of the critical value isnegative corresponding to a 1-tailed test with lower rejectregion and negative lower critical value.What are the Null and Alternate Hypotheses?(Keep the Excel file open for the next parts of the question.)
Question28 / 8pointsRefer to the Weight Watchers file here:Weight Watchers.xlsx
Use Excel to test. For each paired difference, compute After –Before. In Data Analysis, t-Test: Paired Two Sample for means,select the After data for Variable 1 Range. Note that thecritical value output by Data Analysis for this test is alwayspositive. In this problem, the sign of the critical value isnegative corresponding to a 1-tailed test with lower rejectregion and negative lower critical value.What is the t-statistic (t-score)?

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