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41 . The philosopher who for the first time mentioned the importance of play (or sports) in education was
A. Plato B. Aristotle
C. Socrates D. John Locke

42 . The process of selecting units from a population to estimate characteristics of the population is called
A. research B. sampling
C. inference D. analyzing

43 . We calculate average marks of a student in the way as we calculate
A. variance B. arithmetic mean
C. geometric mean D. standard deviation

44 . The __________ is a measure of how spreads out points are from the mean.
A. variance B. arithmetic mean
C. geometric mean D. standard deviation

45 . The standard deviation is the __________ of the variance.
A. cube B. cube root
C. square D. square root




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