Questions from Statistics


Q: McDonald’s claims that its ice cream cones typically weigh 3.18

McDonald’s claims that its ice cream cones typically weigh 3.18 ounces (converted from grams). Here are the weights, in ounces, of cones purchased on different days from different servers: 4.2, 3.6, 3...

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Q: Many people believe that healthy people typically have a body temperature of

Many people believe that healthy people typically have a body temperature of 98.6°F. We took a random sample of 10 people and found the following temperatures: 98.4, 98.8, 98.7, 98.7, 98.6, 97.2, 98.4...

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Q: Random samples of 30 professors of ethics and 30 professors in other

Random samples of 30 professors of ethics and 30 professors in other disciplines (not ethics) were asked how many days it had been since they contacted their mothers; this included phone calls and fac...

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Q: Determine whether the population mean number of texts sent and the population

Determine whether the population mean number of texts sent and the population number received (for all the respondents) is different at the 0.05 level by using a paired t-test.

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Q: Determine whether the median number of texts sent and the median number

Determine whether the median number of texts sent and the median number received for all StatCrunch users are different at the 0.05 level by using a sign test.

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Q: Determine whether the number of texts sent by females and the number

Determine whether the number of texts sent by females and the number received by females are significantly different at the 0.05 level using a paired t-test.

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Q: Determine whether the number of texts sent by males and the number

Determine whether the number of texts sent by males and the number received by males are significantly different at the 0.05 level using a paired t-test.

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Q: Find the difference in number of texts received and the number sent

Find the difference in number of texts received and the number sent for females. Do the same for males. Then determine whether the differences are significantly different at the 0.05 level using the t...

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Q: Does soda constitute a larger part of the diet for women than

Does soda constitute a larger part of the diet for women than it does for men? A StatCrunch survey asked people to report the percentage of their liquid intake that is soda. The sample mean for the 16...

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Q: Refer to exercise 13.35, which discussed a study on

Refer to exercise 13.35, which discussed a study on the effects of cloud seeding to produce rainfall. Some researchers think that cloud seeding has little effect on “low rain potenti...

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