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Novay_Z [31]
3 years ago
13

(09.07 LC) In a study of 250 adults, the mean heart rate was 70 beats per minute. Assume the population of heart rates is known

to be approximately normal with a standard deviation of 12 beats per minute. What is the 99% confidence interval for the mean beats per minute? (6 points)
A. 68.9-76.3
B. 70-72
C. 61.2-72.8
D. 68-72​
Mathematics
1 answer:
Ahat [919]3 years ago
5 0
The answer is B. 70-72!
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