Lab 5 - Azfar Khandoker Dr. Knapp STAT 350 4:30 Lab #6 1....

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Azfar Khandoker Dr. Knapp STAT 350 4:30 Lab #6 1. a. Fertilizer N Mean Std Dev A 17 144.076471 11.5830441 B 20 153.085000 15.4839229 C 20 159.295000 11.8159337 D 17 143.788235 10.5040398 b. Source of variation df SS MS F Treatments 3 3147.69690 1049.23230 6.60 Error 70 11120.023024 158.85747 Total 73 14267.72014 c. p-value : 0.0005 H o : µ A = µ B = µ C = µ D With a p-value of 0.0005 and α = 0.05, we reject H o , in that there is a statistically significant difference between the mean effect of the fertilizers.
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d. Fertilizer C Fertilizer B Fertilizer A Fertilizer D 159.295 153.085 144.076 143.788 ______________________ ___________________________________ Based on our analyses, we conclude that Fertilizer B is not statistically significantly different from the other fertilizers in their average effect on corn yield. However, Fertilizer C is statistically significantly different from both Fertilizer A and D in their average effect on corn yield. 2. a. Diet N Mean Std Dev Atkins 10 36.1 2.6352314 Grapefruit 10 -2.65 13.3254352 Jenny Craig 12 24.3916667 6.6624399 None 15 10.4333333 8.2599576 Nutrisystem 10 36.04 6.4436360 South Beach 11 19.4272727 7.0861966 Weight Watchers 12 14.725 11.5781240 b.
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Source of variation df SS MS F Treatments 6 12183.28606 2030.54768 27.18 Error 73 5454.37582 74.71748 Total 79 17637.66187 c. p-value : less than 0.0001 H o : µ Atkins = µ Grapefruit = µ Jenny Craig = µ South Beach = µ Weight Watchers = µ Nutrisystem = µ None With a p-value of less than 0.0001 with α = 0.05, we reject H o , in that there is a statistically significant difference between the mean weight loss of the diets. d.
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This note was uploaded on 02/16/2010 for the course STAT 350 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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Lab 5 - Azfar Khandoker Dr. Knapp STAT 350 4:30 Lab #6 1....

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