Null and Alternative Hypotheses Quiz
The question sheet
Reveal any answer as you study-
Null and alternative hypotheses are stated in terms of which parameters?
- x-bar or s
- n or N
- z or t
- μ or p
Reveal answer
Answer: μ or p
Source evidence
PDF page 414: State the null hypothesis, H0, and the alternative hypothesis. Ha, in terms of the appropriate parameter (μ or p).
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For claim a, what is the stated mean number of years Americans work before retiring?
- 34
- 60
- 100
- 29
Reveal answer
Answer: 34
Source evidence
PDF page 414: a. The mean number of years Americans work before retiring is 34.
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Claim b states that at most what percent of Americans vote in presidential elections?
- 5%
- 29%
- 60%
- 50%
Reveal answer
Answer: 60%
Source evidence
PDF page 414: b. At most 60% of Americans vote in presidential elections.
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Claim c states the mean starting salary for graduates is at least what amount?
- $34,000
- $50,000
- $20,000
- $100,000
Reveal answer
Answer: $100,000
Source evidence
PDF page 414: c. The mean starting salary for San Jose State University graduates is at least $100,000 per year.
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According to claim d, what percent of high school seniors get drunk each month?
- 5%
- 29%
- 11%
- 50%
Reveal answer
Answer: 29%
Source evidence
PDF page 414: d. Twenty-nine percent of high school seniors get drunk each month.
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Claim e states that fewer than what percent of LA adults ride the bus to work?
- 5%
- 29%
- 11%
- 60%
Reveal answer
Answer: 5%
Source evidence
PDF page 414: e. Fewer than 5% of adults ride the bus to work in Los Angeles.
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Claim f states the mean number of cars a person owns in a lifetime is:
- exactly ten
- at least ten
- more than ten
- not more than ten
Reveal answer
Answer: not more than ten
Source evidence
PDF page 414: f. The mean number of cars a person owns in her lifetime is not more than ten.
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Claim g states that about what portion of Americans prefer to live away from cities?
- a quarter
- three-fourths
- two-thirds
- half
Reveal answer
Answer: half
Source evidence
PDF page 414: g. About half of Americans prefer to live away from cities, given the choice.
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Claim h states Europeans have a mean paid vacation each year of:
- four weeks
- ten weeks
- two weeks
- six weeks
Reveal answer
Answer: six weeks
Source evidence
PDF page 414: h. Europeans have a mean paid vacation each year of six weeks.
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Claim i states the chance of developing breast cancer for women is:
- more than 20%
- over 29%
- exactly 5%
- under 11%
Reveal answer
Answer: under 11%
Source evidence
PDF page 414: i. The chance of developing breast cancer is under 11% for women.
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Claim j states private universities' mean tuition cost is:
- under $20,000
- more than $20,000
- at least $20,000
- exactly $20,000
Reveal answer
Answer: more than $20,000
Source evidence
PDF page 414: j. Private universities' mean tuition cost is more than $20,000 per year.
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In the smoking study, how many of the 273 teen girls said they smoked to stay thin?
- 11
- 273
- 30
- 63
Reveal answer
Answer: 63
Source evidence
PDF page 414: smoking. Researchers surveyed a group of 273 randomly selected teen girls living in Massachusetts (between 12 and 15 years old). After four years the girls were surveyed again. Sixty-three said they smoked to stay thin. Is there good evidence that more than thirty percent of the teen girls smoke to stay thin? The alternative hypothesis is:
Introductory Business Statistics
Introductory Business Statistics by OpenStax, used under CC BY 4.0. Changes made by Stratacademy.
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