Directions: Identify the range and class interval of the following data.
Range
For us to easily find the range, we first arrange the data set from least to greatest.
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Least to Greatest Order
2 , 2 , 2 , 4 , 4 , 6 , 6 , 6 ,
7 , 7 , 7 , 8 , 8 , 8 , 8 , 8 ,
8 , 9 , 9 , 10 , 11 , 12 , 13 , 13 ,
13 , 14 , 14 , 16 , 16 , 18 , 18 , 19 ,
20 , 21 , 22 , 24 , 25 , 26 , 32 , 32
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To find the range, subtract the lowest value from the largest value.
Range = highest – lowest
Range = 32 – 2
Range = 30
Class interval
To find the class interval, we should do a 'range divided by the desired number of classes.'
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[tex](Class\:Interval = \frac{range}{desired\:\:number\:\:of\:\:classes})[/tex]
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Class interval = range ÷ desired number of classes
Class interval = 30 ÷ 6
Class interval = 5
