The thicknesses of metal plates made by a particular machine are normally distributed with a mean of

Question:

The thicknesses of metal plates made by a particular machine are normally distributed with a mean of 4.3 mm and a standard deviation of 0.12 mm.
(a) What are the upper and lower quartiles of the metal plate thicknesses?
(b) What is the value of c for which there is 80% probability that a metal plate has a thickness within the interval [4.3 - c, 4.3 + c]?
Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Question Posted: