T-Interval For A Population Mean
A random sample of 30 patients has a mean resting heart rate of 72 BPM and a sample standard deviation of 10 BPM. For a 95% confidence interval using a t-distribution with 29 degrees of freedom, the critical value is t* = 2.045 and the margin of error is 3.73 BPM. Which of the following is the 95% confidence interval for the true mean heart rate?
A
Approximately (66.00, 78.00) BPM.
B
Approximately (68.27, 75.73) BPM.
C
Approximately (69.00, 75.00) BPM.
D
Approximately (70.00, 74.00) BPM.
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