11- If VB, =0 then distribution is: (A) Skewed. (B) Symmetrical (C) -vely skewed (D) None of these 12- If a distribution has two modes then it is called: (A) Uni-model (B) Bi-model (C) Tri-model (D) None of these 13- In binomial probability distribution (5+ ) parameters are: (A) (25.) (3) (100, () (5.4) www.filmkidunya.com 14- ference between upper and lower quartile (A) Mean deviation (B) Quartile deviation (C) Inter quartile range (D) Range 15- The difference between the upper and lower class boundary of a class is known as: (A) Class frequency (B) Class mark (C) Class limit (D) None of these 16- A set of all possible outcomes of a random experiment is called: (A) Null set (B) Sample points (C) . Sample space (D) Simple events 17- An expected value of a random variable is equal to its: (A) Variance (B) S.D (C) Co-variance (D) Mean1-1 An index number computed for a single commodity is called: (A) Simple index (B) Composite index (C) Weighted index (D) Retail price index 2- For certain frequency distribution E(X -20) =25 and E(X-18) =0. then mean is: (A) 20 (B) 25 (C) 18 (D) Zero 3- If a coin is tossed four times, the number of total sample points will be: (A) 4 (B) 8 (C) 16 innya.com 4- The process of system and columns is banedin Carrangement of data into rows (B) Stub ") Box head (D) Tabulation In hypergeometric experiment the successive trials are: (A) Independent (B) Dependent (C) Fixed (D) Infinite .6- Difference between largest and smallest value is called: (A) Standard deviation (B) Mean deviation (C) Quartile deviation (D) Range 7- The sum of square of deviation from mean is: (A) Least (B) Infinity (C) Zero (D) None of these