The following data represent the pulse rates (beats per minute) of nine students

Question

The following data represent the pulse rates (beats per minute) of nine students enrolled in a statistics course. Treat the nine students as a population. Complete parts (a) through (c) (a) Compute the population standard deviation. sigma: 7.6 beats/minute (Type an integer or decimal rounded to one decimal place as needed.) (b) Determine the sample standard deviation of the following two simple random samples of size 3. Sample 1 {Perpectual, Kevin, Clarice} Sample 2 {Crystal, Kathy, Jeff} The sample standard deviation, s, of sample 1, {Perpectual, Kevin, Clarice}, is beats per minute. (Type an integer or decimal rounded to one decimal place as needed.)

Explanation / Answer

You can use the excel formula stdev(Number 1, number 2,.....) to find the standard deviation.

So,

Sample standard deviation of sample 1

= stdev(72, 61, 64)

= 5.7

Sample standard deviation of sample 2

= stdev(63, 84, 66)

= 11.4

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