The inside diameter of a randomly selected piston ring is a random variable with mean value 10 cm and standard deviation 0.08 cm. Suppose the distribution of the diameter is normal. (Round your answers to four decimal places.)
(a) Calculate
P(9.99 ? X ? 10.01)
when n = 16.
P(9.99 ? X ? 10.01)
=
(b) How likely is it that the sample mean diameter exceeds 10.01 when n = 25?
P(X ? 10.01)
=