APFIVE T-Interval For A Population Mean
A cardiologist measures the resting heart rates of 30 patients and finds a sample mean of 72 BPM with a standard deviation of 10 BPM. Using the t-distribution for a 95% confidence interval, which interval best estimates the true mean heart rate?
| Sample Mean | Sample Standard Deviation | Sample Size | t* (df=29) | Margin of Error |
|---|---|---|---|---|
| 72 BPM | 10 BPM | 30 | 2.045 | 3.73 BPM |
A
Approximately (70.00, 74.00) BPM.
B
Approximately (66.00, 78.00) BPM.
C
Approximately (68.27, 75.73) BPM.
D
Approximately (69.00, 75.00) BPM.
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