Answer the following questions using what you’ve learned from this unit. Write your responses in the space provided.

1. If a student is chosen at random from those who participated in the survey, what is the probability that the student is a male?

Answer choices:

0.29
0.21
0.58
0.42

2. If a student is chosen at random from those who participated in the survey, what is the probability that the student is a male and participates in school sports?

Answer choices:

0.22
0.379
0.524
0.62

3. If a student is chosen at random from those who participated in the survey, what is the probability that the student participates in sports?

Answer choices:

0.379
0.42
0.524
0.58

4. If a student is chosen at random from those who participated in the survey, what is the probability that the student participates in school sports, given that the student is a male?

Answer choices:

0.379
0.476
0.524
0.621

5. If a student is chosen at random from those who participated in the survey, what is the probability that the student is male, given that the student participates in sports?

Answer choices:

0.379
0.42
0.524
0.58

6. To determine whether participating in sports and being male are independent events, which of the given probabilities should you compare? Select two choices.

Answer choices:

P(participate in sports)
P(don’t participate in sports)
P(male)
P(male|don’t participate in sports)
P(participate in sports|male)
P(don’t participate in sports|male)

7. Are participating in sports and being male independent events?

Answer choices:

Yes. The probabilities are the same.
Yes. The probabilities are different.
No. The probabilities are the same.
No. The probabilities are different.

9. Which swimmer should the coach choose as alternate?

Answer choices:

Carson
Ellis
Prestin
Ryan
Zach

10. Which swimmer should the coach choose as anchor?

Answer choices:

Carson
Ellis
Prestin
Ryan
Zach

11. What is the probability that Jean will find a close parking space and short lines at store A?

Answer choices:

0.675
0.713
0.72
0.76

12. What is the probability that Jean will find a close parking space and short lines at store B?

Answer choices:

0.675
0.713
0.72
0.76

13. Which store should Jean choose to maximize the probability of finding a nearby parking space and getting in a short line?

Answer choices:

Store A
Store B
It doesn’t matter.
It can’t be determined.

14. In a randomly generated list of numbers from 0 to 8, what is the probability that each number will occur?

Answer choices:

$frac\{1\}\{7\}$71
$frac\{1\}\{8\}$81
$frac\{1\}\{9\}$91
$frac\{1\}\{80\}$801

15. A randomly generated list of numbers from 0 to 7 is being used to simulate an event, with the numbers 0 and 1 representing a success. What is the estimated probability of a success?

Answer choices:

20%
25%
28.6%
33.3%

16. About 10 percent of people are left-handed. Using single digits, which would be a correct method of assigning digits?

Answer choices:

Left-handed: 1; right-handed: 2 – 9
Left-handed: 1; right-handed: 2 – 10
Left-handed: 0; right-handed: 1 – 9
Left-handed: 0; 1 right-handed: 2 – 9

17. How many trials were included in the simulation?

Answer choices:

5
10
20
100

18. Using 0 to represent a left-handed person, how many trials included at least one left-handed person?

Answer choices:

5
9
11
12

19. What is the estimated probability that there is at least one left-handed person in a group of five people?

Answer choices:

11%
22%
50%
55%

20. If you want to increase the likelihood that your estimated probability is close to the actual probability, what should you do?

Answer choices:

Change the assignment of digits.

Increase the number of trials from 20 to 50.

Decrease the number of trials from 20 to 10.

Decrease the size of the random number groups from five digits to two.