If the mean of the following distribution is 2.6, then the value of y is
Variable (x): | 1 | 2 | 3 | 4 | 5 |
Frequency: | 4 | 5 | y | 1 | 2 |
Let the draw the frequency distribution table for the above data
Variable(xi) | Frequency(fi) | fixi |
1 2 3 4 5 | 4 5 y 1 2 | 4 10 3y 4 10 |
As we know the mean(
In this case,
So we have
⇒ 31.2 + 2.6y = 28 + 3y
⇒ 3.2 = 0.4y
⇒ y = 8