The pulse rates of 161 randomly selected adult males vary from a low of37 bpm to a high of 97 bpm. 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 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.Assume that σ=13.7 bpm, based on the value s=13.7 bpm from the sample of 161male pulse rates.c. Compare the results from parts​ (a) and​ (b). Which result is likely to be​ better?

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Asked Mar 26, 2020
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The pulse rates of 161 randomly selected adult males vary from a low of
37 bpm to a high of 97 bpm. 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 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.Assume that σ=13.7 bpm, based on the value s=13.7 bpm from the sample of 161
male pulse rates.
c. Compare the results from parts​ (a) and​ (b). Which result is likely to be​ better?
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Expert Answer

Step 1

The provided information are:

Statistics homework question answer, step 1, image 1

Step 2

(a)

To compute the sample size, standard deviation is required which can be calculated as:

Statistics homework question answer, step 2, image 1

Now, the sample size can be calculated as:

Statistics homework question answer, step 2, image 2

 

Step 3

(b)

Given:

σ=13.7

The sample size can be calculated as:

Statistics homework question answer, step 3, image 1

 

...

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