The pulse rates of 180 randomly selected adult males vary from a low of 38 bpm to a high of 98bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 95% confidence that the sample mean is within 2bpm of the population mean. Complete parts a through c.
a. Find the minimum sample size based on the t-score approximation with df=180-1=179
b. Assume that σ = 10.8 bpm, then calculate the minimum sample size
c. Compare the results from parts a and b. which result is most safe?
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