5. A study was performed to compare the e↵ect of dietary supplementation with a low-ﬁbre reﬁned...

5. A study was performed to compare the e↵ect of dietary supplementation with a low-ﬁbre reﬁned wheat product on the serum cholesterol of 20 healthy participants aged 23-49 years. Each subject had a cholesterol level measured at baseline and then was randomly assigned to receive either a high-ﬁbre or lowﬁbre diet for 6 weeks. A 2-week period followed during which no supplements were taken. Participants then took the alternative supplement for a 6-week period. The results are shown below:

n Baseline High fiber low fiber difference(high fibre - low fibre) difference(high fibre - baseline) difference(low fibre-baseline)

total Cholesterol(mg/dl) 20 186 +-31 172+-28 172+-25 -1 -14 -13

(-8, +7) (-21,7) (-20,7)
(a) Does the high-ﬁbre diet change cholesterol level from baseline? Justify your answer.

(b)Does the low-ﬁbre diet change cholesterol level from baseline? Justify your answer.

(c)Is the change due to the high-ﬁbre diet di↵erent from the change due to the low-ﬁbre diet? Justify.

Expert Solution

orchestra answered 1 year ago

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