In a random sample of 23 people, the mean commute time to work was 31.8 minutes and the standard deviation was 7.2 minutes. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence interval for the population mean μ. What is the margin of error of μ? Interpret the results. The confidence interval for the population mean μ is (___,___). (Round to one decimal place as needed.) The margin of error of μ is nothing (Round to one decimal place asneeded.) Interpret the results. A.If a large sample of people are taken approximately 90% of them will have commute times between the bounds of the confidence interval. B.With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval. C.It can be said that 90% of people have a commute time between the bounds of the confidence interval. D.With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.
In a random sample of 23 people, the
The confidence interval for the population mean μ is (___,___).
(Round to one decimal place as needed.)
The margin of error of μ is nothing (Round to one decimal place asneeded.)
Interpret the results.
A.If a large sample of people are taken approximately 90% of them will have commute times between the bounds of the confidence interval.
B.With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval.
C.It can be said that 90% of people have a commute time between the bounds of the confidence interval.
D.With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.
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