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Customer Question

1. You have applied for...

1. You have applied for a job and are told by the interviewer that the probability of your being hired is 0.70. What is the odds that you will be hired. (Points: 2)

A) 3 to 7

B) 7 to 3

C) 7 to 10

D) 10 to 7

2. The odds of the Dallas Cowboys winning this year's Super Bowl are 3 to 1. Compute the probability of the Cowboys winning. (Points: 2)

A) 0.33

B) 0.25

C) 0.75

D) None of the above

3. An appliance dealer calculated the proportion of new dishwashers sold that required various numbers of service calls to correct problems during the warranty period. The records were:

No. of Service calls Relative frequency

0 0.25

1 0.38

2 0.30

3 0.04

4 0.03

Let X be the number of service calls during the warranty period for a dishwasher.

What is the probability that there will be between two and four (inclusive) service calls? (Points: 2)

A) 0.34

B) 0.04

C) 0.07

D) 0.37

4. The table below gives the probabilities of combinations of religion and political parties in a major U.S. city.

Religion

Political Parties Protestant (A) Catholic (B) Jewish (C) Other (D)

Democrat (E) 0.35 0.10 0.03 0.02

Republican (F) 0.27 0.09 0.02 0.01

Independent (G) 0.05 0.03 0.02 0.01

What is the probability that a randomly selected person would be a Democrat who was not Jewish?

(Points: 2)

A) 0.93

B) 0.50

C) 0.47

D) 0.07

5. Events are _______ when the occurrence of one event changes the probability that another will occur. (Points: 2)

A) Independent

B) Dependent

C) Mutually Exclusive

D) Disjoint

6. The number of hungry people in Ethiopia is an example of a discrete random variable. (Points: 2)

True

False

7. Approximately 14 percent of the population of Arizona is 65 years or older. A random sample of five persons from this population is taken. The probability that less than 2 of the 5 are 65 years or older is: (Points: 2)

A) 0.4704

B) 0.1467

C) 0.8533

D) 0.3829

8. Brendalee and Mohammed go to a coffee shop during their lunch break and toss a coin to see who will pay. The probability that Brendalee will pay three days in a row is ____. (Points: 2)

A) 0.2500

B) 0.5000

C) 0.1250

D) 0.0150

9. The expected number of heads in 160 tosses of an unbiased coin is ___. (Points: 2)

A) 100

B) 80

C) 60

D) 40

10. Given a binomial random variable with n = 15 and = 0.4, find the following probability using the binomial table. P (6 < x < 10) (Points: 2)

A) 0.0338

B) 0.1181

C) 0.0947

D) 0.3564

A) 3 to 7

B) 7 to 3

C) 7 to 10

D) 10 to 7

2. The odds of the Dallas Cowboys winning this year's Super Bowl are 3 to 1. Compute the probability of the Cowboys winning. (Points: 2)

A) 0.33

B) 0.25

C) 0.75

D) None of the above

3. An appliance dealer calculated the proportion of new dishwashers sold that required various numbers of service calls to correct problems during the warranty period. The records were:

No. of Service calls Relative frequency

0 0.25

1 0.38

2 0.30

3 0.04

4 0.03

Let X be the number of service calls during the warranty period for a dishwasher.

What is the probability that there will be between two and four (inclusive) service calls? (Points: 2)

A) 0.34

B) 0.04

C) 0.07

D) 0.37

4. The table below gives the probabilities of combinations of religion and political parties in a major U.S. city.

Religion

Political Parties Protestant (A) Catholic (B) Jewish (C) Other (D)

Democrat (E) 0.35 0.10 0.03 0.02

Republican (F) 0.27 0.09 0.02 0.01

Independent (G) 0.05 0.03 0.02 0.01

What is the probability that a randomly selected person would be a Democrat who was not Jewish?

(Points: 2)

A) 0.93

B) 0.50

C) 0.47

D) 0.07

5. Events are _______ when the occurrence of one event changes the probability that another will occur. (Points: 2)

A) Independent

B) Dependent

C) Mutually Exclusive

D) Disjoint

6. The number of hungry people in Ethiopia is an example of a discrete random variable. (Points: 2)

True

False

7. Approximately 14 percent of the population of Arizona is 65 years or older. A random sample of five persons from this population is taken. The probability that less than 2 of the 5 are 65 years or older is: (Points: 2)

A) 0.4704

B) 0.1467

C) 0.8533

D) 0.3829

8. Brendalee and Mohammed go to a coffee shop during their lunch break and toss a coin to see who will pay. The probability that Brendalee will pay three days in a row is ____. (Points: 2)

A) 0.2500

B) 0.5000

C) 0.1250

D) 0.0150

9. The expected number of heads in 160 tosses of an unbiased coin is ___. (Points: 2)

A) 100

B) 80

C) 60

D) 40

10. Given a binomial random variable with n = 15 and = 0.4, find the following probability using the binomial table. P (6 < x < 10) (Points: 2)

A) 0.0338

B) 0.1181

C) 0.0947

D) 0.3564

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