Answer these multiple choice questions. These do not need much explanation.

Q1. Judging from recent experience, 5% of the computer keyboards produced by an automatic, high-speed machine are defective. If six keyboards are randomly selected, what is the probability that none of the keyboards are defective?

Select one:

a.0.001

b.0.167

c.0.735

d.0.500

Q2. Sweetwater & Associates write weekend trip insurance at a very nominal charge. Records show that the probability that a motorist will have an accident during the weekend and file a claim is 0.0020. Suppose they wrote 1,000 policies for the coming weekend, what is the probability that exactly two claims will be filed?

Select one:

a.0.1353

b.0.0040

c.2.0500

d.0.2707

Q3. The time to fly between New York City and Chicago is uniformly distributed with a minimum of 75 minutes and a maximum of 105 minutes. What is the distribution's mean?

Select one:

a.105 minutes

b.90 minutes

c.180 minutes

d.75 minutes

Q4. The total area of a normal probability distribution is _______.

Select one:

a.between 3.0 and 3.0

b.dependent on a value ofz

c.approximated by the binomial distribution

d.1.00

Q5. The shape of any uniform probability distribution is ____________.

Select one:

a.bell-shaped

b.rectangular

c.positively skewed

d.negatively skewed

Q6. The mean amount spent by a family of four on food is $500 per month with a standard deviation of $75. Assuming that the food costs are normally distributed, what is the probability that a family spends less than $410 per month?

Select one:

a.0.1151

b.0.8750

c.0.0362

d.0.2158

Q7. Which of the following is correct about a probability distribution?

Select one:

a.The outcomes must be mutually exclusive.

b.The probability of each outcome must be between 0.0 and 1.0 inclusive.

c.The sum of all possible outcomes must equal 1.0.

d.All of these answers are correct.

Q8. Which of the following is true regarding the normal distribution?

Select one:

a.The points of the curve meet the X-axis atz= 3 andz= 3.

b.The mean, median, and mode are all equal.

c.It is asymmetrical.

d.It has two modes.

Q9. Two normal distributions are compared. One has a mean of 10 and a standard deviation of 10. The second normal distribution has a mean of 10 and a standard deviation of 2. Which of the following is true?

Select one:

a.The locations of the distributions are different.

b.The dispersions of the distributions are different.

c.The dispersions of the distributions are the same.

d.The distributions are from two different families of distributions.

Q10. The probability distribution for the number of automobiles lined up at a Lakeside Olds dealer at opening time (7:30 AM) for service is:

Number	Probability
1	0.05
2	0.30
3	0.55
4	0.10

On a typical day, how many automobiles should Lakeside Olds expect to be lined up at opening time?

Select one:

a.2.26

b.0.50

c.2.70

d.5.00