practice - These are practice questions from tests and...

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Unformatted text preview: These are practice questions from tests and exams in various years (may be from various courses). No solution will be provided. I try to give you more practice questions in probabilities because you guys do need practice in these questions. Question 1: The following data represent the number of driver fatalities in US in 2002 by age for male and female drivers. Age Male Female Total < 15 228 108 336 [15 , 20) 5696 2386 8082 [20 , 35) 13553 4148 17701 [35 , 55) 14395 5017 19412 [55 , 70) 4937 1708 6645 ≥ 70 3159 1529 4688 Total 41968 14896 56864 (a) What is the probability that a randomly selected driver fatality who was either a male or older than 15 years old but younger than 35 years old? (b) What is the probability that a randomly selected female driver fatality who was older than 15 years old but younger than 35 years old? Question 2: Consider the following stem-and-leaf plot and some summary statistics: LEAF UNIT: tenth Stem Leaf 6 5 7 38 8 13367 9 2345699 10 12368 11 2389 12 18 13 11 14 6 15 16 8 17 18 n = 31 , X x i = 329 . 1 , X x 2 i = 3695 . 33 , X ( x i- ¯ x ) 2 = 201 . 5619 a. Obtain the histogram using the first class [5 . , 7 . 0). Comment on the shape of the histogram....
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This note was uploaded on 12/22/2010 for the course MATHEMATIC Math 1131 taught by Professor Augustinewong during the Spring '10 term at York University.

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practice - These are practice questions from tests and...

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