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A medical researcher measured the pulse rates (beats per minute) of a sample of randomly selected adults and found the following Student's t-based confidence interval: With
95.00% Confidence, 69.333336 <μ(Pulse) <73.065927
a) Explain carefully what the software output means.
b) What's the margin of error for this interval?
c) If the researcher had calculated a 90% confidence interval, would the margin of error be larger or smaller?
a) Explain carefully what the software output means.
OA. The interval 69.3 to 73.1 beats per minute contains the true mean heart rate 95% of the time.
OB. 95% of the pulse rates will be between 69.3 to 73.1 beats per minute.
OC. 95% of all pulse rates will have a mean rate between 69.3 to 73.1 beats per minute.
OD. We are 95% confident the interval 69.3 to 73.1 beats per minute contains the true mean heart rate.
b) What's the margin of error for this interval?
(Round to one decimal place.)
(Kound to one decimal place.)
c) If the researcher had calculated a 90% confidence interval, would the margin of error be larger or smaller?
OA. The margin of error would have been larger.
OB. The margin of error would have been smaller.
OC. The margin of error would have remained the same.
