The histogram shows the lengths of index fingers (in millimeters) for a sample of eighth-graders.

a. Use the histogram to approximate the mean ring finger length for the sample.

b. Approximate the mean by completing the work that is started below. Note that the left-hand side of each bin is being used in this approximation:

c. Explain why the method used in part (b) is an approximation of the mean rather than the actual mean.

Transcribed Image Text:

3(60) + 9(70) + 5(80) + ... 27