1)If X is a binomial random variable with n = 8 and p = 0.6, what is the probability that X is equal to 4?

Select one:

a.0.275.

b.0.232

c.0.324.

d.0.500.

2)Cameron Cage, Information Services Manager with Global Financial Service (GFS), is studying employee use of GFS email for non-business communications. A random sample of 200 email messages was selected. Thirty of the messages were not business related. The 95% confidence interval for the population proportion is:

Select one:

a.0.153 to 0.247.

b.0.101 to 0.199.

c.0.108 to 0.192.

d.0.091 to 0.209.

3)In a set of 50 purchasing transactions, two transactions violated (V) company procurement policies and the remaining forty-eight complied (C) with company policies. An auditor randomly selects four of the 50 transactions without replacement, and classifies each as violated (V) or complied (C). Which of the following is NOT an elementary event for this experiment?

Select one:

a.(V, C, V, V).

b.(C, C, C, C).

c.(V, C, V, C).

d.(C, V, C, C).