Supposexhas a distribution with a mean of50and a standard deviation of9. Random samples of sizen=36

are drawn.

(a) Describe thexdistribution and compute the mean and standard deviation of the distribution.

I have _x=50 _x= 1.5 and that x has an approximately normal distribution?

(b) Find thezvalue corresponding tox=47.

z=

(c) FindP(x<47).

(Round your answer to four decimal places.)

P(x<47) =