Question

The mean of the following data is 21.6. Find the value of p
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Answer 1

Step-by-step explanation:

Observations =

we have to multiply fi with xi

30 , 48 , 18p , 144 , 120 , 216

Sum of observations = 30 +48 +18p +144 +120 + 216

558 + 18p

Now ,

No. of observations =

we have to add fi

5 +4 + p + 6 + 4 + 6

25 + p

Mean = Sum of observations / no. of observations

= (558 + 18p ) / 25 +p

= 18 ( 31 + p ) / 25 + p

Hope this helps