One way to measure a person’s fitness is to measure their body fat percentage. Average body fat percentages vary by age, but according to some guidelines, the normal range for men is 15-20% body fat, and the normal range for women is 20-25% body fat.

The body fat of 25 gym goers was measured by a trainer and the Mean and standard deviation for each group is summarized in table below.

Group	Sample Size (n)	Average (X-bar)	Standard deviation (s)
Women	10	22.29	5.32
Men	15	14.95	6.84

A) What should the Null hypothesis say about the mean body fat percentage of women compared to the mean body fat percentage of males?
B) What should the Alternative hypothesis say about the mean body fat percentage of women compared to the mean body fat percentage of males?
C) Is the p-value for your test less than 0.05? "yes" or "no"
D) At the 0.05 significance level, is there enough evidence to conclude that the mean body fat percentage for women is more than 3% greater than men? "yes" or "no"
E) At the 0.01 significance level, is there enough evidence to conclude that the mean body fat percentage for women is more than 3% greater than men? "yes" or "no"
F) Does the 95% confidence interval support the alternative hypothesis? "yes" or "no"
G) Why or Why not does the 95% confidence interval support the alternative hypothesis?

Answer rating: 100% (QA)

Answer 1 Null hypothesis It is not 3 more F M 3 2 Alternative hypothesis It is greater than 3 more H... View the full answer