would become wider as compared to the estimated 95% confidence interval because the margin of error would increase. The estimated 90% confidence interval would become narrower as compared to the estimated 95% confidence interval because the margin of error would increase. None of the other answers is correct The estimated 90% confidence interval would become narrower as compared to the estimated 95% confidence interval because the margin of error would decrease. The estimated 90% confidence interval would become wider as compared to the estimated 95% confidence interval
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A scientist wants to know more about the time it takes runners to complete a marathon. The distribution of marathon times is unknown, but from historical studies, the population standard deviation is known to be 35 minutes. The scientist takes a random sample of 100 runners and find that the average time in their sample to be 270 minutes.
If we wanted to construct a 90% confidence interval, then which of the following would be true?
Group of answer choices
The estimated 90% confidence interval would become wider as compared to the estimated 95% confidence interval because the margin of error would increase.
The estimated 90% confidence interval would become narrower as compared to the estimated 95% confidence interval because the margin of error would increase.
None of the other answers is correct
The estimated 90% confidence interval would become narrower as compared to the estimated 95% confidence interval because the margin of error would decrease.
The estimated 90% confidence interval would become wider as compared to the estimated 95% confidence interval because the margin of error would decrease.
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