1.

The number of vehicles per family In families residing in a certain area are given in the following table. Find the mean for the number of vehicles.

Answer»
No. of vehicles vNo. of families fCumulative frequency cf
022
146
2915
3722
4325
Totaln = 25–

Median of number of vehicles:
M = Value of (n+1 / 2)th observation
= Value of (25+1 / 2)
= 13th observation,
Referring to cf column.
M = 2 vehicles
Hence, median of number of vehicles = 2 vehicles.


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