The range of the given data is 34.
The width of the class interval in the given data is 4.
Range is the difference between the highest and lowest values of a set of observations
Range =Upper-class boundary of the highest interval – Lower class boundary of the lowest interval
79 - 45 = 34
The class width is the difference between the upper bound and lower bound.
Class width : 49 - 45 = 4
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