Pulse rates. 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:
![1170_dfcc1838-fb03-4c53-b24a-fdb24ecd9176.png](https://secure.tutorsglobe.com/CMSImages/1170_dfcc1838-fb03-4c53-b24a-fdb24ecd9176.png)
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 99% confidence interval, would the margin of error be larger or smaller? Explain.