In a random sample of 19 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 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.) • A. With 90% confidence, it can be said that the population mean commute time is 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. If a large sample of people are taken approximately 90% of them will have commute times 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.
In a random sample of 19 people, the
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.)
• A. With 90% confidence, it can be said that the population mean commute time is 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. If a large sample of people are taken approximately 90% of them will have commute times 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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