calculate standard deviation and coefficient of standard deviation.
X :- 5 ,15 , 25, 35 , 45 , 55, 65, 75
frequency : 5, 8, 7, 12, 28, 10, 10
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Answer:
Standard Deviation s = 24.494897
Variance s2 = 600
Count n = 8
Mean x¯¯¯ = 40
Sum of Squares SS = 4200
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