In ___________ the data are classified with reference to geographical locations such as countries, states, cities districts etc.

A ____________ covers only a few elements of the total population 

__________ does not mean causation.  It only means co variation.

The ___________ is the difference between the largest and the smallest values of variable.

In the __________ every individual has an equal chance of being selected and the individuals who are selected are just like the ones who are not selected.

___________ are the measure which divide the data in the four equal parts, each portion contains equal number of observations.

__________ shows how different values of a variable are distributed in different classes along with their corresponding class frequencies.

Which is NOT an economic activity ?

__________ is the root cause of all economic problems.