Posted by **marilyn** on Sunday, September 5, 2010 at 11:08am.

how to do histogram and relative- frequency histogram using the #s 1,5,5,6,7,4,8,7,6,5,5,6,7,6,6,5,8,9,9, 10,7,8,11,2,4,6,5,12,13,6,3,7,8,8,9,9,10,9,8,9

with five classes

- statistics -
**PsyDAG**, Monday, September 6, 2010 at 11:53am
Range = 1-13 giving you 14 different score values

14/5 = 2 4/5, so 3 would seem to be best interval size.

For each score, put an X in the appropriate interval. The number of X's in each interval will determine the height of the bar for that interval for a histogram.

Divided each interval frequency by the N (total number of scores) to get the relative frequency and use those values to determine the height of the vertical bars.

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