Question
In a random sample of 17 people, the mean commute time to work was 32.8 minutes and the standard deviation was 7.2 minutes. Assume the
In a random sample of 17 people, the mean commute time to work was 32.8 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 . What is the margin of error of ? Interpret the results
The confidence interval for the population mean is ( ) , ( )
.
(Round to one decimal place as needed.)
The margin of error of is ( )
(Round to one decimal place as needed.)
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.
It can be said that 90% of people have a commute time between the bounds of the confidence interval.
C.
With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.
D.
With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval.
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