Conduct a test of independence. Quiz
The question sheet
Reveal any answer as you study-
In the ice cream flavor study, what significance level is used to test independence?
- 10 percent
- 1 percent
- 5 percent
- 0.5 percent
Reveal answer
Answer: 5 percent
Source evidence
PDF page 639: areas of the United States. Based on Table 11.51, do the numbers suggest that geographic location is independent of favorite ice cream flavors? Test at the 5 percent significance level.
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For the ice cream study, what is being tested for independence?
- Salary and flavor
- Age and flavor
- Geographic location and flavor
- Gender and flavor
Reveal answer
Answer: Geographic location and flavor
Source evidence
PDF page 639: areas of the United States. Based on Table 11.51, do the numbers suggest that geographic location is independent of favorite ice cream flavors? Test at the 5 percent significance level.
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In the ice cream table, what is the column total for all regions combined?
- 97
- 102
- 391
- 112
Reveal answer
Answer: 391
Source evidence
PDF page 639: Column Total 45 112 101 46 60 27 391
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How many people in the West region chose Rocky Road?
- 19
- 21
- 8
- 12
Reveal answer
Answer: 8
Source evidence
PDF page 639: West 12 21 22 19 15 8 97
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What is the row total for the South region in the ice cream study?
- 96
- 391
- 102
- 97
Reveal answer
Answer: 102
Source evidence
PDF page 639: South 15 28 30 8 15 6 102
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In the entrepreneur study, what two things are tested for independence?
- Region and flavor
- Age and net worth
- Ethnicity and opinion
- Salary and education
Reveal answer
Answer: Age and net worth
Source evidence
PDF page 639: estimated at one million dollars or more. Their ages range from 17 to 30. Each cell in the table illustrates the number of entrepreneurs who correspond to the specific age group and their net worth. Are the ages and net worth independent? Perform a test of independence at the 5 percent significance level.
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What is the total number of entrepreneurs in the net worth study?
- 24
- 12
- 40
- 14
Reveal answer
Answer: 40
Source evidence
PDF page 639: Column Total 14 12 14 40
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In the 2013 California tax poll, what is tested for independence?
- Salary and response
- Response and ethnic group
- Region and opinion
- Age and opinion
Reveal answer
Answer: Response and ethnic group
Source evidence
PDF page 639: classified by ethnic group and response type. Are the poll responses independent of the participants’ ethnic group? Conduct a test of independence at the 5 percent significance level.
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How many total people were surveyed in the California tax poll?
- 1,235
- 682
- 459
- 94
Reveal answer
Answer: 1,235
Source evidence
PDF page 639: Column Total 118 710 81 326 1,235
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How many White/Non-Hispanic respondents were against the tax?
- 433
- 160
- 41
- 48
Reveal answer
Answer: 433
Source evidence
PDF page 639: Against Tax 48 433 41 160 682
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How many Latino respondents had no opinion on the tax?
- 19
- 24
- 43
- 16
Reveal answer
Answer: 19
Source evidence
PDF page 639: No Opinion 16 43 16 19 94
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In the education and salary study, what test is conducted?
- Test of independence
- Test of symmetry
- Goodness-of-fit test
- Test of homogeneity
Reveal answer
Answer: Test of independence
Source evidence
PDF page 638: of education an individual has and salary. Conduct a test of independence.
Statistics
Statistics by OpenStax, used under CC BY 4.0. Changes made by Stratacademy.
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