Question

# 1) What is the lambda value for the Poisson distribution?

Select one:

a. 0

b. 1/2

c.

1

d. 2

e. sqrt(1/2)

2) The the time between incoming customer service calls to a computer-repair hotline follows an exponential distribution with an expectation of 2 minutes between calls. What is the probability that the time between calls will be less than 1 minute for a randomly selected period?

Select one:

a. .44

b. .31

c. .39

d. .61

e. .07

3) The time between customer service calls to a computer-repair hotline follows an exponential distribution with an expectation of 2 minutes between calls. We collect calls for 40 minutes at random times during the month (a sample of size n=40). What is the probability that the mean of our sampling distribution will be greater than 2.2 minutes?

Select one:

a. .17

b. .26

c. .37

d. .68

e. .78

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