(a) A survey needs to be conducted about eating habits of different age groups in a particular locality. For this researcher divided the population into four groups: Children, Young
Age, Middle Age and Old Age. Then the researcher selected the sample of 100 from the
population. For his study he included 25% children, 25% young age, 25% middle age
and 25% old age people.
Which of the sampling technique is used by the researcher in the given scenario? Give
merits and demerits of this method.
(b) Highlight the important functions performed by NSSO.