1.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. Based on this information, what is the probability of a student reading at more than 1000 words per minute after finishing the course?

Select one:

a.0.5207

b.0.0202

c.0.4091

d.0.9798

2.The monthly electrical utility bills of all customers for the Far East Power and Light Company are known to be distributed as a normal distribution with mean equal to $87.00 a month and standard deviation of $36.00. If a statistical sample of n = 100 customers is selected at random, what is the probability that the mean bill for those sampled will exceed $85.00?

Select one:

a.3.33

b.-0.33

c.Approximately 0.71

d.About 1.00

3.The time between calls to an emergency 911-call center with a mean time between calls of 645 seconds and standard deviation of 150 seconds. Based on this information, what is the probability that the time between the next two calls is between 200 and 400 seconds?

Select one:

a.0.199

b.0.050

c.0.801

d.0.747

4.The transportation manager for the State of New Jersey has determined that the time between arrivals at a toll booth on the state's turnpike with?= 8 cars per minute. Based on this information, the average time between arrivals is _____.

Select one:

a.25 seconds

b.15 seconds

c.7.5 seconds

d.2 minutes

5.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, the probability that 3 containers will contain a total of less than 2 defects is _____.

Select one:

a.0.1359

b.0.0073

c.0.0003

d.0.1850

6.Based on the data, suppose one person is randomly chosen, what is the probability that the person chosen is a male who prefers product C?

6.9 7.5 6.5 7.3 7.2 7.5 7.8Product Preference Gender A B C Male 80 20 10 Female 200 70 120