Posted by **kelly** on Monday, July 30, 2012 at 2:13pm.

how do you find the lower class limit,upper class limit, class width, class midpoint, and class boundaries from a set of frequencies data

- stats 101 -
**MathMate**, Monday, July 30, 2012 at 4:59pm
Sort out the data in increasing order.

If there are n pieces of data, calculate nc=√n to be the number of classes. Round up to the next integer if necessary.

Find class width by dividing n by nc. Again round up to the next integer if necessary.

Start the first class with the smallest value (or smallest value -1) and increment each class start point by adding class width to the previous.

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