Question

Calculate the mean of the following frequency distribution by direct method.x 4 6 9 10 15

f 5 10 10 7 8

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Answer 1

Answer:

mean = 9

Step-by-step explanation:

X. f. fx

4. 5. 2O

6. 10. 60

9. 10. 90

10. 7. 70

15. 8 120

€f =N = 40. €fx=360

Mean = €fx/N

Mean = 360/40 =9