Help Please

Using the binomial probability distribution, if n = 8 and p = 0.32, what is the probability of getting exactly 4 successes?

	0.186
	0.157
	0.145
	0.324

Question 2

A poison hot line receives, on the average, four calls per hour on its toll-free number. For any given hour, what is the probability that it will receive at most five calls in one hour?

Question 2 options:

	0.215
	0.785
	0.629
	0.195

Question 3

The Bank of Hawaii reports that 7% of its credit card holders will default at some time in their life. The Hilo branch just mailed out 12 new cards today. This is a binomial probability problem.

1. How many of these new cardholders would you expect to default?

2. What is the likelihood that none of the cardholders will default?

3. What is the likelihood that at least one will default?

Question 4

The average number of days a person will be sick this year is 7 with a standard deviation of 2. If a person is picked at random, the probability that he or she will be sick less than 5 days would be 0.3413. (Assume days sick per year is normally distributed.)

	True
	False

Question 5

1. Convert the following data into a probability distribution and then compute the mean number of calls.

Number of Calls	Frequency	Probability
0	8
1	10
2	22
3	9
4	1
Total

A. Mean number of calls =

B. What is the probability that 1 or fewer calls are made?

Question 6

What is the probability that a king will be selected on the first draw from the deck of 52 cards and another king on the second draw (assuming that the first king was not replaced)?