16.The size of a population is 100 and every 5th person is selected to form a sample. This technique of sampling is known as

17.�The child is an integral part of the ultimate universe� is the view point of

18.For Harmonious development of the personality of the child, parents should

19.Who among the following described the intellectual development as age related development?

20.In an ethnographical study which of the following technique is most appropriate?