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A medical researcher measured the pulse rates​ (beats per​ minute) of a sample of randomly selected...

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, 65.946814 < mu​(Pulse) < 70.928411 ​

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?

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