The comfort widget company makes severtal different widgets. The smallest widget the company manufactures has a mean diameter of 3.5 inches with a standard deviation of .25 inches. The distribution of measurments for this widget's diameter is approximatly normal.
a) What is the probability that a single widget will have a diameter greater than 3.7 inches?
b) Describe the distrubution of sample mean diameters for samples of size 40.
c) What is the probability that a sample of size 40 small widgets will have a mean diameter greater than 3.7 inches?
All of this statistics stuff is really confusing the hell out of me.