n=8
Mean number of televesions per household= 4
Standard deviation= 1
Find the number of households have between 0 and 4 television
As a first step we are going to check the within numbers:
So, now, we can find the value of k:
Now, using the chebychev's theorem:
Then, the number of the house holds would be:
There are at least 7.5 households that have between 0 and 4 televisions