Question

the mean of the following data is 11 the value of p ​

Answer 1

STATISTICS

If the mean of the following data is 8, find the value of p.

x 3 5 7 9 11 13

f 6 8 15 p 8 4

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ANSWER

x f f

i

x

i

3 6 18

5 8 40

7 15 105

9 p 9p

11 8 88

13 4 52

Total 41+p 303+9p

Mean =

41+p

303+9p

or, 8(41+p)=303+9p

or, 328+8p=303+9p

or,

p=25