Question

The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs 18. Find the missing frequency;

Daily pocket allowance (in )	11-13	13-15	15-17	17-19	19-21	21-23	23-25
Number of children	7	6	9	15	f	5	4

Answer 1

Let the assumed mean A=16 and class size h=2, here we apply step deviation method.