@me,, please show work :-) 21) for a random sample of n=203 adults in a survey,

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@me,, please show work :-)

21) for a random sample of n=203 adults in a survey, here is asummary of responses to "how long did you sleep last night"

variable   N      mean   stdev
sleeppp   203   6.42      1.56

what confidence level would be associated with the interval6.42±0.11 as a confidence interval for the populationmean?

a. 50%
b. 68% @
c. 90%
d. 95%

22) the cholesterol levels of a random sample of 100 men aremeasured. The sample mean is 188 and the sample standard deviationis 40. which of the following provides a 95% confidence intervalfor the population mean?

a)188 does not equal (1.96)(0.4)
b)188 does not equal (1.96)(4) @
c)188 does not equal (1.96)(40)
d)188 does not equal (1.96)(4000)

Explanation / Answer

21) for a random sample of n=203 adults in a survey, here is asummary of responses to "how long did you sleep last night"

variable   N      mean   stdev
sleeppp   203   6.42      1.56

what confidence level would be associated with the interval6.42±0.11 as a confidence interval for the populationmean?

a. 50%
b. 68% @
c. 90%
d. 95%

22) the cholesterol levels of a random sample of 100 men aremeasured. The sample mean is 188 and the sample standard deviationis 40. which of the following provides a 95% confidence intervalfor the population mean?

a)188 does not equal (1.96)(0.4)
b)188 does not equal(1.96)(4) @
c)188 does not equal (1.96)(40)
d)188 does not equal (1.96)(4000)

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