Question

A tax auditor is selecting a sample of 7 tax returns for an audit. If 4 or more of these returns are​"improper," the entire population of 45 tax returns will be audited. Complete parts​ (a) through​ (e) below.

Q. What is the probability that the entire population will be audited if the true number of improper returns in the population is:

a) 15

b) 20

c) 5

d) 10

Answer 1

Ans

a)

P(improper returns) = 15/45 = 0.33

P = 0.1682

b)

P(improper returns) = 20/45 = 0.44

P= 0.3706

c)

P(improper returns) = 5/45 = 0.11

P = 0.0039

d)

P(improper returns) = 10/45 = 0.22

P = 0.0461