?Which of the following is not part of the process of constructing a histogram?
A. ?Grouping data into equal size numerical intervals.
B. ?Grouping data in non-numerical categories.
C. ?Finding the frequency in each interval.
D. ?Graphing data, with intervals on the horizontal axis and frequency on the vertical axis.
E. ?The sum of the frequencies equals the total number of data.
Answer: B
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