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A researcher studied the effects of three experimental diets with varying fat contents on the total lipid...

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Question

Basic Math

A researcher studied the effects of three experimental dietswith varying fat contents on

the total lipid (fat) level in plasma. Total lipid level is awidely used predictor of coronary heart disease.

Fifteen male subjects who were within 20 percent of their idealbody weight were grouped into five

blocks according to age. Within each block, the threeexperimental diets were randomly assigned to the

three subjects. Data on reduction in lipid level (in grams perliter) after the subjects were on the diet for

a fixed period of time follow.

Fat Content of Diet

Blockj=1j=2j=3
iExtremely LowFairly LowModerately Low
1Ages 15-24.73.67.15
2Ages 25-34.86.75.21
3Ages 35-44.94.81.26
4Ages 45-541.401.32.75
5Ages 55-641.621.41.78

How would I obtain an analysis of variance table and testwhether or not the mean reductions in lipid levels differ for thethree diets using alpha(a = .05)?

Answer & Explanation Solved by verified expert
3.7 Ratings (704 Votes)
Since the problem is to determinewhether or not the mean reductions in lipid levels differ for thethree diets we should use TWOWAY ANOVA to solve this I have usedR to solve this problemR CODETWO WAYANOVATwowayaovLipidDietAgedatadatasummaryTwowayOUTPUTHYPOTHESISThe hypothesis is given bya The mean reduction in lipid levels for three different diets aresame The mean reduction in    See Answer
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