Question 6.

Determine the probability that in a sample of 100 the sample proportion is less than .75 if p = 0.80

Question 7.

The proportion of eligible voters in the next election who will vote for the incumbent is assumed to

be 55%. What is the probability that in a random sample of 500 voters less than 49% say they will

vote for the incumbent?

Question 8.

The manager of a restaurant in a commercial building has determined that the proportion of

customers who drink tea is 14%. What is the probability that in the next 100 customers at least 10%

will be tea drinkers?

Question 9.

In 2014, approximately 13% of nonelderly Americans adults had no health insurance. Suppose that a

random sample of 400 such individuals was drawn. What is the probability that 15% or more had no

health insurance?