Question

In a study of 225 adults, the average heart rate was 72 beats per minute. Assume the population of heart rates is known to be approximately normal, with a standard

deviation of 10 beats per minute. What does a margin of error of 1.1 for the 90% confidence interval of the average beats per minute mean?

Answer 1

There is a 90% chance that the population mean is between 70.9 and 73.1 beats per minute.

Explanation:

took test

Answer 2

it means that if the survey is repeated there is a 90% chance that the average heart rate is 72 bears per minute with plus or minus 1.1 %

Explanation:

Confidence interval explains to what percentage will the result be true if the experiment is repeated multiple times

Margin of error tells the range of accuracy if the result is true when the experiment is repeated multiple times.