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Construct a frequency table for the following weights (in gm) of 35 mangoes using the equal class intervals, one of them is 40-45 (45 not included) :30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68.(i) What is the class mark of the class interval 40-45?(ii) What is the range of the above weights?(iii) How many classes are there? |
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Answer»
(i) Class mark for the class interval 40 – 45: Class mark = (40+45) / 2 = 85/2 = 42.5 (ii) Range of the above weights: Range = Highest value – Lowest value Range = 74 – 30 = 44 (iii) Number of classes = 9 |
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