Author Question: The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 ... (Read 85 times)

nmorano1 · **on:** Jul 25, 2018

The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.30 inches and a standard deviation of 0.01 inches. What percentage of bolts will have a diameter greater than 0.32 inches?

A) 47.72 B) 97.72 C) 2.28 D) 37.45

Question 2

The variable X is normally distributed.The mean is = 22.0 and the standard deviation is = 2.4.
Find P(19.7 < X < 25.3).

A) 1.0847 B) 0.3370 C) 0.7477 D) 0.4107