The class marks of the distribution are 37,42,47,52 and 57. Determine the class-size and the class limits of the last class mark
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Lower class mark = 37 Upper class mark = 57 Range = 57 - 37 = 20 Let the number of classes be 4. Therefore, size of the class = 20/4 = 5. Class limits are 36 - 40, 41 - 45, 46 - 50, 51 - 55, 56 - 60.
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