Question

Find the requested value.

A researcher wishes to estimate the mean resting heart rate for long-distance runners. A random sample of  runners yields the following heart rates, in beats per minute.



Use the data to obtain a point estimate of the mean resting heart rate for all long distance runners.

		69.6 beats per minute
		66.2 beats per minute
		64.6 beats per minute
		67.8 beats per minute

Answer 1

We want to find a point estimate of the mean resting heart rate for all long-distance runners.

Let x = Resting heart rate for all long-distance runners beats per minute

x = 69.6,66.2,64.6,67.8

n= 4

We know that the point estimate of population mean(u) is sample mean(xbar)

sample mean = ?

sum of x = 69.6 + 66.2 + 64.6 + 67.8 = 268.2

sample mean = sum of x / n

= 286.2 / 4

= 67.05

Sample mean = 67.05

Answer:- 67.05 is the point estimate of the mean resting heart rate for all long-distance runners.