The inside diameter of a randomly selected piston ring is a random variable with mean value 12 cm and standard deviation 0.4 cm. Let X is the sarnple mean diameter for a random sample of n:64 rings.
(a) Find the sampling distribution of. X. Specify the parameters.
(b) Find the probability of P(11.99 < X < 12.01)
(c) Find the probability of P( lX - 12| < 0.05)
(d) Find the 95th percentile of X.
X = X with the line over it