SOLUTION: The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days. What is

Question 1050168: The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days and standard deviation 16 days. What is the probability that the average pregnancy length for six randomly chosen women exceeds 270 days?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

P(x>270) = 1 - P(<=270) = 1- P(z<= (270-266)/(16/sqrt(6)) = 1- P(z<= .6124)
P(z<= .6124) = .73
P(x>270) = 1- P(z<= .6124) = 1 -.73 = .27
RELATED QUESTIONS
The length of human pregnancies from conception to birth varies according to a... (answered by edjones)

The length of human pregnancies from conception to birth varies according to a... (answered by stanbon)

The length of elephant pregnancies from conception to birth varies according to a... (answered by ewatrrr)

The length of human pregnancies from conception to birth varies according to an... (answered by CPhill)

(i).The length of human pregnancies from conception to birth approximates a normal... (answered by ewatrrr,stanbon)

the length of all human pregnancies is approximately normal with a mean of 266 days and a (answered by ewatrrr)

Assume that the mean length of a human pregnancy is 268 days with a standard deviation of (answered by stanbon)

The length of human pregnancies varies normally with a mean of 266 days and a standard... (answered by Fombitz)

The length of human pregnancies varies normally with a mean of 266 days and a standard... (answered by amfagge92)