Question

BY STEP DEVIATION METHOD
1. Find the mean of the distribution:
Class
1-3
3-5
5-7
7-10
Frequency
9
22
27
17​

Answer 1

Impossible because they have no common difference all contain 2 as common difference but last one contain 3 as a common difference

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Answer 2

Answer:

C I Frequency(fi) xi. (fixi)

1-3. 9. 2. 18

3-5. 22. 4. 88

5-7. 27. 6. 162

7-10. 17. 8.5. 114.5

75 412.5

mean=£fixi

£fi

= 412.5 = 5.5

75

answer= 5.5

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