SOLUTION: The Body-mass index (BMI) of all American 20-something women is believed to follow a normal distribution with a standard deviation of 6.5. Find how many 20-something women should b

Question 867522: The Body-mass index (BMI) of all American 20-something women is believed to follow a normal distribution with a standard deviation of 6.5. Find how many 20-something women should be randomly sampled if we want the mean BMI of such a sample to be within 1 BMI unit of the population mean with 95 percent confidence.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The Body-mass index (BMI) of all American 20-something women is believed to follow a normal distribution with a standard deviation of 6.5. Find how many 20-something women should be randomly sampled if we want the mean BMI of such a sample to be within 1 BMI unit of the population mean with 95 percent confidence.
------------------------------
n = [z*s/E]^2 = [1.96*6.5/1]^2 = 163 when rounded up
-----------------------------------
Cheers,
Stan H.
=====================
RELATED QUESTIONS
A student reads that a 95% confidence interval for the mean body mass index (BMI) of... (answered by jim_thompson5910)

The following table cross classifies pregnant women in the study by their body mass index (answered by Boreal)

The average BMI (body mass index) of college students is normally distributed with a mean (answered by Theo)

The body-mass index, or BMI, is used by physicians to assess a person's level of body... (answered by jorel1380)

Variation Problem A persons level of fatness is measured using the Body Mass Index, or (answered by Mathtut)

For your Final Paper, you will have the opportunity to apply your knowledge for a real... (answered by CPhill)

Hello, How are you? Attached is a dataset that lists estimates of the percentage... (answered by ikleyn)

Hi, I need help with this problem, In a survay of 4722 American youngsters aged 6 to... (answered by stanbon)

BMI. Body mass index (BMI) = weight in lbs/height inches^2 x 703. An adult BMI of 24 is... (answered by stanbon)