Mathematics
The class marks of a distribution are 94, 104, 114, 124, 134, 144 and 154. Determine the class size and the class limits of the fourth class.
Statistics
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Answer
Class size = Difference between two successive class marks = 104 - 94 = 10.
Class mark of fourth class = 124.
Lower limit of class = Class mark - (Class size/2)
= 124 -
= 124 - 5
= 119.
Upper class limit = Class mark + (Class size/2)
= 124 +
= 124 + 5
= 129.
Hence, class size = 10, lower limit = 119 and upper limit = 129.
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