Question

(Ans. Weighted Arithmetic Average = 1.59 per ko
23. Calculate weighted mean of the following data by using Direct and Short-cut Methods:
Items
81 76 74 T 58 70 73
Weight
2
3
6
7
3
7




(Ans. Weighted Moan ...​

Answer 1

answer:

items(xi) weight(w) xiw

81 2 162

76 3 228

74 6 444

58 7 406

70 3 210

73 7 511

total 28 1961

direct method

mean = wxi/w

=1961/28

=70.04 answer

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