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R COMMANDER OUTPUT R COMMANDER OUTPUT meat = chicken 32 o 38 o Shapiro-Wilk normality test data: triglyceride 40 W = 0.90761, p-value = 0.1245 meat = fish Shapiro-Wilk normality test data: triglyceride W = 0.87041, p-value = 0.03421 meat = pork Shapiro-Wilk normality test data: triglyceride chicken fish pork W = 0.93761, p-value = 0.3533 meat R COMMANDER OUTPUT Levene's Test for Homogeneity of Variance (center = "mean") Df F value Pr(>F) group 2 0.7724 0.4683 42 a. Discuss and interpret the results obtained in testing the assumptions of the F-test. b. Which between a parametric test or a non-parametric test would you recommend? ngycende OL

R COMMANDER OUTPUT R COMMANDER OUTPUT meat = chicken 32 o 38 o Shapiro-Wilk normality test data: triglyceride 40 W = 0.90761, p-value = 0.1245 meat = fish Shapiro-Wilk normality test data: triglyceride W = 0.87041, p-value = 0.03421 meat = pork Shapiro-Wilk normality test data: triglyceride chicken fish pork W = 0.93761, p-value = 0.3533 meat R COMMANDER OUTPUT Levene's Test for Homogeneity of Variance (center = "mean") Df F value Pr(>F) group 2 0.7724 0.4683 42 a. Discuss and interpret the results obtained in testing the assumptions of the F-test. b. Which between a parametric test or a non-parametric test would you recommend? ngycende OL

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Pork is the most preferred meat by a lot of meat consumers. Studies have shown that diets high in pork protein have favorable effects on a person's body composition. However, it is unclear whether these effects are specific to pork or whether consumption of other high protein meat diets have the same benefit. To investigate this, the nutritionist of a private diet center chose a random sample of overweight clients to participate in a 3-month program where each person is required to follow a restricted high-protein diet program with only one type of meat (chicken, fish, or pork). Before and after the program, the triglyceride level and weight of each client were recorded. Suppose the nutritionist asks your statistical advice for this study. 1. The nutritionist wants to study whether the mean change in triglyceride level of the clients differs among the three meat diets. She then asked your statistical advice considering that you have enough knowledge that using a parametric test specifically the F-test in Analysis of Variance (ANOVA) can answer her objective. Using R Commander, the following results for the test of the assumptions were generated. R COMMANDER OUTPUT meat = chicken meat = fish meat = pork 38. 320 032 043 -- -- -1 1 -1 -1 1 norm quantiles norm quantiles norm quantiles triglyceride 10 20 30 40 50 triglyceride 10 20 30 40 50 triglyceride 10 20 40 50
Transcribed Image Text:Pork is the most preferred meat by a lot of meat consumers. Studies have shown that diets high in pork protein have favorable effects on a person's body composition. However, it is unclear whether these effects are specific to pork or whether consumption of other high protein meat diets have the same benefit. To investigate this, the nutritionist of a private diet center chose a random sample of overweight clients to participate in a 3-month program where each person is required to follow a restricted high-protein diet program with only one type of meat (chicken, fish, or pork). Before and after the program, the triglyceride level and weight of each client were recorded. Suppose the nutritionist asks your statistical advice for this study. 1. The nutritionist wants to study whether the mean change in triglyceride level of the clients differs among the three meat diets. She then asked your statistical advice considering that you have enough knowledge that using a parametric test specifically the F-test in Analysis of Variance (ANOVA) can answer her objective. Using R Commander, the following results for the test of the assumptions were generated. R COMMANDER OUTPUT meat = chicken meat = fish meat = pork 38. 320 032 043 -- -- -1 1 -1 -1 1 norm quantiles norm quantiles norm quantiles triglyceride 10 20 30 40 50 triglyceride 10 20 30 40 50 triglyceride 10 20 40 50
R COMMANDER OUTPUT R COMMANDER OUTPUT meat = chicken 32 o 38 o Shapiro-Wilk normality test data: triglyceride W = 0.90761, p-value = 0.1245 meat = fish Shapiro-Wilk normality test data: triglyceride W = 0.87041, p-value = 0.03421 10 meat = pork Shapiro-Wilk normality test data: triglyceride fish chicken pork W = 0.93761, p-value = 0.3533 meat R COMMANDER OUTPUT Levene's Test for Homogeneity of Variance (center = "mean") Df F value Pr(>F) 2 0.7724 0.4683 group 42 a. Discuss and interpret the results obtained in testing the assumptions of the F-test. b. Which between a parametric test or a non-parametric test would you recommend? triglyceride OS
Transcribed Image Text:R COMMANDER OUTPUT R COMMANDER OUTPUT meat = chicken 32 o 38 o Shapiro-Wilk normality test data: triglyceride W = 0.90761, p-value = 0.1245 meat = fish Shapiro-Wilk normality test data: triglyceride W = 0.87041, p-value = 0.03421 10 meat = pork Shapiro-Wilk normality test data: triglyceride fish chicken pork W = 0.93761, p-value = 0.3533 meat R COMMANDER OUTPUT Levene's Test for Homogeneity of Variance (center = "mean") Df F value Pr(>F) 2 0.7724 0.4683 group 42 a. Discuss and interpret the results obtained in testing the assumptions of the F-test. b. Which between a parametric test or a non-parametric test would you recommend? triglyceride OS
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