Question

Find the
mean of the following data using direct method
C.I
15-25
25-35
35-45
45-55
55-65
65-75
F
6
11
7
4
4
2
​find it by assumed mean method
pls ​

Answer 1

Let the number x be. The correct number is 7x / 8 The incorrect number is 7x / 18 Depending on the question, 7x / 18 = 7x / 8 - 770 Solving this, we get x = 1584

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