48. in a research undertaken by a school teacher in in respect of critical understanding of the students of his/her school, the following results were obtained:

48. In a research undertaken by a school teacher in in respect of critical understanding of the students of his/her school, the following results were obtained: Mean= 50, O = 10, N = 100 Indicate the range of scores at alpha level 0.05 for finding the value of true mean for the population of such students in the whole district. A. From 50.1 to 52.2