SOLUTION: For a group of 10 subjected to a stresssituation, the mean number of heartbeats per minute was 126 and standard deviation was 4. Find 95% confidence interval of the true mean.

Question 1080207: For a group of 10 subjected to a stresssituation, the mean number of heartbeats per minute was 126 and standard deviation was 4. Find 95% confidence interval of the true mean.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
For a group of 10 subjected to a stress situation, the mean number of heartbeats per minute was 126 and standard deviation was 4. Find 95% confidence interval of the true mean.
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Sample mean:: 126
E = z*s/sqrt(n) = 1.96*4/sqrt(10) = 2.4792
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95% CI: 126- 2.4792 < u < 126 + 2.4792
95% CI: 123.52 < u < 128.479
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Cheers,
Stan H.
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