Upper True Limit: Add a 5 to the decimal place to the right of the last number appearing in the

__highest__value specified by the number in the class interval.

Lower True Limit: Subtract a 5 to the decimal place to the right of the last number appearing in the

__lowest__value specified by the number in the class interval.

If the class intervals of a variable are defined by whole numbers, to find the upper limit we add .5 to the highest value specified by the category, and to find the lower limit we subtract .5 from the lowest value specified in the category. The limits of other numbers could be similarly determined. The table below provides some illustrations.

Click to Enlarge

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ReplyDeleteHow do we find lower and upper real limits if we have the classes such as

ReplyDelete10-20

20-30

30-40

40-50

50-60

Etc

And

10-12

14-16

18-20

22-24

Etc

I need help on this.