Math Snap

STEP 1

1. The heart rates provided are from a random sample of 9 runners.
2. The point estimate for the mean heart rate is the sample mean.

STEP 2

1. Sum the heart rates.
2. Calculate the sample mean.
3. Round the sample mean to one decimal place.

STEP 3

List the heart rates:
$$116, 122, 106, 132, 126, 149, 109, 145, 134$$

STEP 4

Sum the heart rates:
$$116 + 122 + 106 + 132 + 126 + 149 + 109 + 145 + 134 = 1,139$$

STEP 5

Calculate the sample mean by dividing the sum by the number of data points (9):
$$\frac{1,139}{9} = 126.5555\ldots$$

Round the sample mean to one decimal place:
$$126.6$$ The point estimate for the mean heart rate is:
$$\boxed{126.6}$$