In a study of the effect of diet on cholesterol rats were fe

In a study of the effect of diet on cholesterol, rats were fed several different diets. One diet had 5% added fiber from oat bran. The study report gives results in the form \"mean plus or minus the standard error of the mean.\" This form is very common in scientific publications. For the 6 rats fed this diet, blood cholesterol levels (in milligrams per deciliter of blood) were
91.71 ± 4.88.

Solution

Here, the confidence interval is

Xbar +/- se

Thus,

Xbar = 91.71 [ANSWER]

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Also,

s = se * sqrt(n)

as se = 4.88, n = 6, then

s = 11.95350994 [ANSWER]