The pulse rates of 152 randomly selected adult males vary from a low of 42 bpm to a high of 110 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 90% confidence that the sample mean is within 4 bpm of the population mean. Complete parts (a) through (c) below. a. Find the sample size using the range rule of thumb to estimate σ.
Added by Kristin G.
Step 1
The range rule of thumb states that the range is approximately 4 times the standard deviation. So, we can estimate the standard deviation by dividing the range by 4. The range is the difference between the highest and lowest values, which is 110 bpm - 42 bpm = 68 Show more…
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