Statistics

(A) 0.0034 (B) 0.0249 (C) 0.15 (D) 0.9966 For Q. 69 _ 72: A town has people with 3 nationalities A, B and C. It was found that 65% of the people in the town are of A, 20% of B and 15% of C. The records shows that the proportion of people committed a crime are 12%, 5% and 3% respectively for nationality A. B and C. If a person is selected randomly from the town, then: (69) The probability that the rson committed a crime will be: (A) 0.108 (B) 0.843 (C) 0.0925 (D) 0.06 (E) 0.0486 (70) If the person selected randomly from the town made a crime. What is the probability that his/her nationality is B: (A) 0.108 (B) 0.843 (C) 00295 (D) 0.06 (E) 0.0486 Page 1 of 12 AI-Azhar Unv. - Fee. or Engineering (Girls). 2"\" year- Second Term 2019-2020 Final Exam - Statistics and Probability (71) If the person selected randomly from the town made a crime. What is the probability that his/her nationality is A: (72) If the person selected randomly from the town made a crime. What is the probability that hisrher nationality is not C: A 0.108 B) 0.843 (C 0.0925 D) 0.08 (00.0486 For Q. 73 79: Let X be a continuous random variable with probability density function is given by: k 1 x , 0 For Q. 85 87: Consider the following probability function: x 0 1 2 3 f(x)= P(X=x) 0.216 0.432 0.288 0.064 (85) The mean (expected value) equals: (A) 1.5 (B) 0.25 (C) 1.2 (D) 1.8 (86) The variance equals: (A) 0.72 (B) 2 (C) 2.16 (D) 1.25 (87) The P(X