SOLUTION: J. McWhorter of College of Health Science at the University of Nevada studied physical therapy students during their graduate-school year. The researchers were interested in the fa

Question 1042239: J. McWhorter of College of Health Science at the University of Nevada studied physical therapy students during their graduate-school year. The researchers were interested in the fact that, although graduate physical therapy students are taught the principles of fitness, some have difficulty finding time to implement those principles. A sample of 27 female graduate physical-therapy students had a mean of 22.46 percent body fat.
Assuming the percent body fat of females graduate physical-therapy students is normally distributed with a standard deviation of 4.10 percent body fat, determine a 95% confidence interval for the mean percent body fat of all female graduate physical-therapy students.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A sample of 27 female graduate physical-therapy students had a mean of 22.46 percent body fat.
Assuming the percent body fat of females graduate physical-therapy students is normally distributed with a standard deviation of 4.10 percent body fat, determine a 95% confidence interval for the mean percent body fat of all female graduate physical-therapy students.
------
x-bar = 22.46
ME = z*s/sqrt(n) = 1.96*4.1/sqrt(27) = 1.547
------
95%CI:: 22.46-1.547 < u < 22.46+1.547
---------------------
Cheers,
Stan H.
--------------
RELATED QUESTIONS
at a well known university, 1/4 of the undergrads commute and 1/3 of the grad students... (answered by user_dude2008,ankor@dixie-net.com)

At a college, 3/5 of the students take a science course. Of the students taking science, (answered by rfer)

Of 100 persons in a company, 70 r married, 80 r college graduates, and 60 r both married... (answered by ikleyn)

In a random sample of 200 students at Eastern Elite University, it was found that 106 had (answered by Boreal)

1. If n(A) = 8, then how many proper subsets does A have? 2. At a local college, a... (answered by Theo)

in a university, 2 out of every 7 students work their way through college, if the school... (answered by stanbon)

A survey of college students was conducted during final exam week to assess the number of (answered by amarjeeth123)

in a second year college class of 100 students, 40 studied mathematics, 64 studied... (answered by rfer)

A group of 2457 students were surveyed about the courses they were taking at their... (answered by jim_thompson5910)