Arthemic mean
in assumed mean
method
40-80 80-120
120-160 160-200
Clay interal 0-40
Frequency
12
20
35
30
23
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Answer:
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Answer:
Find the arithmetic mean using the assumed - mean method:Class interval100 - 120120 - 140140 - 160160 - 180180 - 200Frequency 10 20 30 15 5
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Let mean = 150 A = 150 Mean = A + ∑fd∑f = 150 + ( - 30ϕ)8ϕ = 150 - 154 = 150 - 3.75 = 146.25 . More
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