Suppose a computer chip manufacturer rejects 5% of the chips produced because they fail presale testing.If we select 50 chips at random,how many chips do you expect to fail the testing?
A)0.05 chips
B)21.8 chips
C)2.5 chips
D)5 chips
E)2 chips

Question

Quizplus · Accepted Answer

Since the manufacturer rejects 5% of the chips produced, we can assume that 5% of any sample of chips will fail presale testing. Thus, we can use the formula for calculating expected value:

Expected value = sample size x probability of event

Expected value = 50 x 0.05

Expected value = 2.5

Therefore, we can expect 2.5 chips out of a sample of 50 to fail presale testing, which is closest to choice C (2.5 chips).

Suppose a Computer Chip Manufacturer Rejects 5% of the Chips