STAT 133 Midterm: statistics134-sp2013-mt1-Sly-soln
Document Summary
There are 4 questions worth a total of 30 points. Attempt all questions and show your working (except in question 1). Additional space is available at the nal page. No notes, cheat sheets, calculators or other references are permitted. Answers can be left in numerical form without simpli cation except where speci ed. No explanation is required. (1 point each) (i) if a and b are events such that a b (i. e. a is a subset of b) then p (a b) = False since p (a b) = p (a). (ii) a bag contains red and green balls. If i draw balls without replacement until the rst green ball then the number of draws is geometric. False, it would be geometric is it were sampled with replacement. (iii) two random variables x and y are independent with x distributed as bin(n1, p) and. Y distributed as bin(n2, p) where n1 6= n2.
