For a group of 15 men subjected to a stressful situation, the mean number of heartbeats per minute was 126, and the standard deviation was 4. Find the 95% confidence interval of the true mean. Assume that variables are approximately normally distributed. о а. 124-129 O b. 123 – 130 О с. 123.78 -128.22 O d. 123.98 - 128.02

MATLAB: An Introduction with Applications
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For a group of 15 men subjected to
a stressful situation, the mean
number of heartbeats per minute
was 126, and the standard deviation
was 4. Find the 95% confidence
interval of the true mean. Assume
that variables are approximately
normally distributed.
O a. 124 – 129
O b. 123 – 130
O c. 123.78 - 128.22
|
o d. 123.98 – 128.02
Transcribed Image Text:For a group of 15 men subjected to a stressful situation, the mean number of heartbeats per minute was 126, and the standard deviation was 4. Find the 95% confidence interval of the true mean. Assume that variables are approximately normally distributed. O a. 124 – 129 O b. 123 – 130 O c. 123.78 - 128.22 | o d. 123.98 – 128.02
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