stats 101

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

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  1. 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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