Question

10 households in a neighborhood are sorted according to their monthly income are given below 16500, 21700, 18600, 21050, 19500, 17000, 21000, 18000, 22000, 75000 

a. What is the mean income of these 10 families?

b. How many families have monthly incomes less than the mean income? Prove that in such situation this average is suitable or not?

Answer 1

a. Mean = \(\cfrac{sum}{number} = \cfrac{248000}{10} = 24800\)

b. 9 families have monthly income less than the mean income. So in this situation this is not a suitable average.