Math Solutions

[All Steps] A crossover study was conducted to investigat e whether oat bran cereal h e lps to lower serum cholesterol levels in hypercholesterolemic males

Question: A crossover study was conducted to investigat e whether oat bran cereal h e lps to lower
serum cholesterol levels in hypercholesterolemic males . Twenty three such individuals
were randomly placed on a die t that included either oat bran or com flakes: afte r two
weeks, their low-density lip o protein (LDL) cholesterol levels were recorded. Each man
was then switched to the alternative diet. After a second two-week period, the LDL
cholesterol level of each individual was again recorded . The data from thi s stud y i s given the following table.

N Mean Std
Com 23 \[{{\bar{X}}_{com}}\] = 4 . 4 \[{{s}_{com}}\] = 0.624281 spoo l ed = 0.683313
Oat 23 \[{{\bar{X}}_{Oat}}\] = 3.86 \[{{s}_{Oat}}\] = 0.742345
Diff 23 \[{{\bar{X}}_{Diff}}\] = .54 \[{{s}_{diff}}\] = 1 . 028502

Use α =0.01 for this test.

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