The amount of time necessary for assembly line workers to complete a product is normally distributed with a mean of 20 minutes and a standard deviation of 3.6 minutes.What is the amount of time such that 80% of product assembly times are greater than this value? Please answer the following parts (a) and (b).

(a) For X = assembly time of a product (minutes), which of the following statements correctly summarises this question?

A.

P(X

B.

P(X

C.

P(X>x) = 0.8where X ~ N(3.6, 20); Find x

D.

P(X>x) = 0.8where X ~ N(20, 3.6); Find x

(b) What is the amount of time such that 80% of product assembly times are greater than this value? State your answer correct to 2 decimal places.

The answer is

nothing

minutes.