how to find class interval
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Calculating Class Interval
Given a set of raw or ungrouped data, how would you group that data into suitable classes that are easy to work with and at the same time meaningful?
The first step is to determine how many classes you want to have. Next, you subtract the lowest value in the data set from the highest value in the data set and then you divide by the number of classes that you want to have:
Example 1:
Group the following raw data into ten classes
Solution:
The first step is to identify the highest and lowest numer
Class interval should always be a whole number and yet in this case we have a decimal number. The solution to this problem is to round off to the nearest whole number.
Given a set of raw or ungrouped data, how would you group that data into suitable classes that are easy to work with and at the same time meaningful?
The first step is to determine how many classes you want to have. Next, you subtract the lowest value in the data set from the highest value in the data set and then you divide by the number of classes that you want to have:
Example 1:
Group the following raw data into ten classes
Solution:
The first step is to identify the highest and lowest numer
Class interval should always be a whole number and yet in this case we have a decimal number. The solution to this problem is to round off to the nearest whole number.
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Each group in which raw data is condensed is called "class interval".
Each class is bounded by two figures,called class limits.On left hand side we have lower limit and right hand side we have upper limit.
Each class is bounded by two figures,called class limits.On left hand side we have lower limit and right hand side we have upper limit.
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