1.In a recent report, it was stated that the proportion of employees who carpool to their work is 0.34 and that the standard deviation of the sampling proportion is 0.0259. However, the report did not indicate what the sample size was. What was the sample size?

Select one:

a.100

b.180

c.335

d.460

2.Assuming that the change in daily closing prices for stocks on the New York Stock Exchange is a random variable that is normally distributed with a mean of $.35 and a standard deviation of $.33. Based on this information, what is the probability that a randomly selected stock will close up $.75 or less?

Select one:

a.0.1131

b.0.3869

c.0.7100

d.0.8869

3.Students who have completed a speed-reading course have reading speeds that are normally distributed with a mean of 950 words per minute and a standard deviation equal to 220 words per minute. If two students were selected at random, what is the probability that they would both read at less than 400 words per minute?

Select one:

a.0.4938

b.0.00004

c.0.2438

d.0.0062

4.The number of visible defects on a product container is thought to be Poisson distributed with a mean equal to 3.5. Based on this, how many defects should be expected if 4 containers are inspected?

Select one:

a.3.5

b.14

c.10.5

d.3.24

5.When a customer comes to a bank, there are three primary locations he or she may select to go to: teller, loan officer, or escrow department. The events are _______.

Select one:

a.dependent

b.mutually exclusive

c.independent

d.mutually inclusive