A factory manufactures steel poles; the length of the poles are approximately normally dis-

tributed with mean 75cm with standard deviation 1cm. Find the probability that a randomly

selected pole will be between 74.5 and 75.8cm.

Ok What i get when i try to transform this to the standard normal is

Z = .8 for X 75.8

and -.5 for X 74.5

I dont know what to do from here.

Any help greatly appreciated.

Thanks