Question

A manufacturing machine has a 40% defect rate. If 131 items are chosen at random, answer the following. a) Which is the correct wording for the random variable? rv X = the number of 131 randomly selected items that are defective Correct b) Pick the correct symbol: n Correct = 131 c) Pick the correct symbol: p Correct = 0.4

Answer 1

A manufacturing machine has a 40% defect rate. If 131 items are chosen at random, then:

• The random variable, X=Number of 131 randomly selected items that are defective.

• Number of Items, n=131
• The point estimate of defective items, p=40%=0.4