Question

the mean of the following frequency distribution is 8. Find the value of P. Frequency 6,8,15,p,8,4 variable 3 ,5 ,7 ,9 11 , 15


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Answer 1

Answer:

Variable(xi) Frequency (fi). fixi

3. 6. 18

5. 8. 40

7. 15. 105

9. p. 9p

11 8. 88

15. 4. 60

Sigma fixi = 18+40+105+9p+88+60 = 311+9p

Sigma fi = 41+p

B.T.P,

311+9p/ 41+p = 8

or, 311 + 9p = 328 + 8p

or, 9p - 8p = 328-311

or, p = 17

So p = 17

Value of P is 17

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