Life of a T.V picture tube is a:___________?
		A. Discrete variable
B. Continuous variable
C. Qualitative variable
D. Constant
		A. Discrete variable
B. Continuous variable
C. Qualitative variable
D. Constant
		A. Independent
B. Dependent
C. Collectively Exhaustive
D. None
		A.	a+b/2
B.	2ab/a+b
C.	√ab
D.	None of these
		A. Greater the degree of freedom, the more the t-distribution resembles the standard normal distribution
B. The Normal Curve is symmetrical whereas the t-distribution are slightly skewed.
C. The proportion of area beyond a specific value of “t” is less than the proportion of normal curve
D. Non of these
A. Size of n
B. Change distribution 
C. Size of alpha
D. None of theseSize of beta
		A. Mathematics
B. Economics
C. Statistic
D. None of these
		A.	1+ fm – f2/f1 –  f2 x h
B.	1+ f1 – f2/f2 –  fm x h
C.	1 + fm – f1/ (fm  – f1) + (fm1 – f2) x h
D.	1+ fm1 – f2/f1 –  fm x h