Question

Which intervals are most appropriate for constructing a frequency table for the data set?

45 53 60 36 22 27 47 68 33 51 55 29 28 45 43

A. 20–35, 35–50, 50–65, 65–80


B. 20–39, 40–49, 50–59, 60–69


C. 20–34, 35–49, 50–64, 65–79


D. 20–39, 40–54, 55–65, 66–75

I think C. I'm not sure though...

Answer 1

Smallest is 22, greatest is 68. Length of intervals should be same.
C is right.

Answer 2

Thanks!!