76.Which is not Naturalism’s aim of Education?

77.The mean height of a group of children is 70 cm; standard deviation 1.3 cm. The coefficient of variation is

78.(r-1) * (k-1) gives the degrees of freedom of

79.An intelligent and educated temple priest has an importance in the village community. To What do you attribute his role and status

80.A researcher is developing items bank for an achievement test in subject A, where item can be either right or wrong. He has selected upper (top 27%) and lower (bottom 27%) of the group for item analysis. Which of the following would be the most appropriate method for determining directly validity of an item?