SOLUTION: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. If 64 women are randomly selected, find the probability that they h
Algebra.Com
Question 1073762: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 266 days and 268 days.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 266 days and 268 days.
-----
z(266) = (266-268)/[15/sqrt(64)] = -2/(15/8) = -1.0667
z(268) = 0
-------------
P(266<= x <= 268) = P(-1<= z <=0) = normalcdf(-1.0667,0) = 0.3569
------------
Cheers,
Stan H.
-------------
RELATED QUESTIONS
The lengths of pregnancies of humans are normally distributed with a mean of 268 days and (answered by khwang)
Lengths of pregnancies of humans are normally distributed with a mean of 268 days and a... (answered by funmath,Edwin McCravy)
The lengths of human pregnancies are normally distributed with a mean of 268 days and a... (answered by stanbon)
The lengths of pregnancies are normally distributed with a mean of 268 days and a... (answered by rothauserc)
the lenghts of pregnancies of humans are normally distributed with a mean of 268 days and (answered by robertb)
Please Help Someone!
Find the indicated probability or percentage for the normally... (answered by rothauserc)
The lengths of pregnancies in a small rural village are normally distributed with a mean... (answered by ikleyn,math_tutor2020)
The lengths of pregnancies in a small rural village are Normally distributed with a mean... (answered by stanbon)
the length of pregnancies of humans are normally distributed with a mean of 268 days and... (answered by ewatrrr)