In a random sample of 29 people, the mean commute time to work was 33.9 minutes and the standard deviation was 7.1 minutes. Assume the population is normally
distributed and use a t-distribution to construct a 90% confidence interval for the population mean u. What is the margin of error of p? Interpret the results.
The confidence interval for the population mean
(Round to one decimal place as needed)
is (L
)
The margin of error of his
(Round to one decimal place as needed)
Interpret the results
O A With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval.
OB. It can be said that 90% of people have a commute time between the bounds of the confidence interval.
OC. With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval
OD. If a large sample of people are taken approximately 90% of them will have commute times between the bounds of the confidence interval
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