ALL PARTS ANswered A,B,C,D When circuit boards used in the manufacture of compact disc players are tested, the long-run percentage of defectives is 5%. Let ? = the number of defective boards in a...

ALL PARTS ANswered A,B,C,D

When circuit boards used in the manufacture of compact disc players are tested, the long-run percentage of defectives is 5%. Let ? = the number of defective boards in a random sample of size ? = 25.

A) Determine ? (? = 2) (Using the formula of the pmf).

B)Determine ? (1 ≤ ? ≤ 4) (Using the table).

C) Calculate the expected value

D) Calculate variance and standard deviation of ?.