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Lab 05Template

# Lab 05Template - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17...

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Your name INSTRUCTIONS: DS 123 Lab #5 1. Under File, select Page Setup. Select the top tab: Sheet. Due: 3/24/08 In the Print window, select Gridlines and Row and Column Headers. 2. Set column A to 10 and column D to 16. 3. Insert a page break above row 49. 4. Define Postexposure as Variable 1 and Preexposure as Variable 2 in the DataAnalysis Toolkit t-test for paired two sample for means for Question 1. Question 1. Problem 9.32, p. 377 Preexp. Postexp. Diffs. t-Test: Paired Two Sample for Means 50 53 -3 25 27 -2 Postexp. Preexp. 30 38 -8 Mean 54.5 50.5 Average diff = 4 50 55 -5 Variance 389.39 341.39 60 61 -1 Observations 10 10 80 85 -5 Pearson Correlation 0.99 45 45 0 Hypothesized Mean 0 30 31 -1 df 9 65 72 -7 t Stat 4.19 70 78 -8 P(T<=t) one-tail 0 Mean = 4 t Critical one-tail 1.83 StDev = 3 P(T<=t) two-tail 0 t Critical two-tail 2.26 Hypotheses: H0: mupost - mupre <= 0 H0: Mupost - mupre <= 0 HA: mpost - mupre not > 0 HA: mupost - Mupre > 0 Rejection Region: df = 9 Rej H0 if p-value < 0.01 2.26 Test Statistic: 4.19 p-value = 0 Conclusion: Since the test statistic of with at least 99% confidence. H0 with at least 99% confidence.

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