The midpoints of intervals for frequency distributions constructed with interval-ratio variables are found by
A)adding the upper and lower class limits for each interval and then dividing by 2.
B)multiplying the upper and lower class limits for each interval.
C)dividing the range by 10.
D)None of these.Class intervals for interval-ratio variables do not have midpoints.

Question

Quizplus · Accepted Answer

Midpoints for frequency distributions constructed with interval-ratio variables are found by calculating the average of the lower and upper class limits for each interval. This is done by adding the lower and upper class limits and dividing the sum by two.

The Midpoints of Intervals for Frequency Distributions Constructed with Interval-Ratio