SAMPLE EXAM 1) A roulette wheel has 38 slots. 18 are Red, 18 are Black and 2 are Green. If the wheel is spur what is the probability that the ball will NOT land on Green? 2) In question I, what are the odds against landing on Green? 3) The levers COCOANUT are written on 8 cards. A card is chosen, when is the probability that it will be a letter in the word CHOCOLATE? 4) Find the malian: 16.9.12.10.15,7 16 5) x1 =3. x, =7. x54, x -2 Find; a) "b) ({ x)2 c)S(x- x) 6) Two laboratories perform taste tests on cola drinks Pepsi got 340 on a test in Lab A where x -250 and s =50 Coise got 195 on a test in Lab B where x -100 and s =60 Which drink appears to taste better? Explain briefly 7) Give an example where the median is a more appropriate measure of center, than the mean is 8) Which of these could NOT be a probability a) 230 %% bj 23 c) .23232323 d) 23% e) 32 9) The mean weight of NFL football players at= 280 lbs the standard deviation is 6 - 24 lbs. ESTIMATE the portion of players who weigh between 240 and 320 Its 10) A, B . C and D are events. P(A) =.15. P(B) = .45, P(C) =.60, P(D) =.90 Which of these is a) Most likely b) Least likely c) Moss predictable d) Least predictable 1 1) A firm gives every employee a $500 bonus. What effect, if any does it have on a) mean b) median c) mode d) standard deviation 12) The mean grade on a statistics exam is /-82, the sunderd deviation is =12 What actual grade has a z-score of z - -1.5 13) A restaurant has 95 patrons. 50 of them have soup and 60 of them have a sandwich. 30 of them have soup and sandwich What is the probability that a patron had soup or a sandwich? 14) In question 13, what is the probability that a patron had a sandwich but did not order soup 15) A, B and C are events. P(A) + 35, P(B) -50. P(C) =.60, P (A or B) -.75. P (A or C) =.95. Which if any of these are mutus'ly exclusive? 16) Mutually exclusive events are (Sometimes, Always, Never) complementary (choose one.) [) A SAMPLE of 10 students had the following grades 67.71.74, 76, 77. 79, 80. 82, 83, 91 Find: a) Range b) Mean c) Median d) Mode e) Standard deviation