Suppose that Donovan is a cardiologist and knows that resting heart rates for healthy individuals follow a normal distribution with a mean of 67.2 beats per minute (bpm). Donovan wants to compare the resting heart rate of the nurses in his hospital with the national average. He decides to conduct a one-sample two-tailed t-test for a mean based on a simple random sample of 10 nurses in his hospital and obtains the following results. Sample size: n = 10 Sample mean: x? = 81.5 bpm Sample standard deviation: s = 15.1 bpm One-sample t-statistic: t = 2.995 P-value: P = 0.015 Determine if the difference between the sample mean of 81.5 bpm and the population mean of 67.2 bpm is statistically significant at the 0.01 significance level. The difference [ ] statistically significant at the 0.01 level because P [ ] 0.01.
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