AnswersConcepts in Probability and Statistics - MA3120 B-CRTwo-Way Tables

Two-Way Tables Answers

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A summer camp has 32 campers. A total of 22 of them swim, 20 play softball, and 5 do not swim or play softball. Which values complete the table?

A
a = 15, b = 10, c = 7, d = 5, e = 12
B
a = 15, b = 7, c = 5, d = 10, e = 12
C
a = 14, b = 7, c = 5, d = 12, e = 10
D
a = 14, b = 12, c = 7, d = 5, e = 10
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Answer:

65

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a = [___] ⇒ 7

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Answer:

7

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Answer:

31

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28

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13

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What is the relative frequency for students who have been to Alaska?

Answers:
Selection 1:15/50
Selection 2:21/50
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✔ 15/5015/3621/5036/50

A
✔ 15/50
B
15/36
C
21/50
D
36/50
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6/506/21✔ 21/5021/36

A
6/50
B
6/21
C
✔ 21/50
D
21/36
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Find the following relative frequencies to the nearest tenth of a percent.

Answers:
Blank 1:16.5
Blank 2:58.9
Blank 3:41.1
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Answer:

16.5

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Answer:

58.9

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Answer:

41.1

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Which statement is true about the marginal frequencies in this table?

A
191 students play sports and 150 students do not.
B
153 students do not participate in sports and seventy-five 12th graders were surveyed
C
153 students do not participate in sports and 190 do.
D
191 students play sports and ninety-seven 10th graders were surveyed.
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Which statement is true about the joint frequencies in this table?

A
Twenty-three 9th graders and fifteen 11th graders prefer math.
B
Fourteen 11th graders prefer math and eight 10th graders prefer science.
C
Thirty-five 12th graders prefer math and nine 10th graders prefer science.
D
Twenty-three 9th graders and thirty-two 12th graders prefer math.
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Find the following relative frequencies to the nearest tenth of a percent. Republican residents of County 1: ⇒ 10.1% Democratic residents of County 1: % Total Republican residents: % Total Democratic residents: %

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Answers:
⇒ 10.1:45/445
Part 2:16.5
Part 3:58.9
Part 4:41.1
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Which statements are correct? Check all that apply.

A
More 7th graders were surveyed than 8th graders.
B
The marginal relative frequency for action movies is 44%.
C
The joint relative frequency for 8th graders who like comedy movies is 16%.
D
Most students prefer drama movies.
E
Half of the 7th graders prefer action movies.

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