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The random variable X denotes the number of speed camera photos taken on a stretch of road. X is assumed to be a Poisson random variable. On average 40 photos are taken each hour. The standard deviation of the number of speed camera photos taken in 2 hours is: QUESTION 4 O a. 8.94 (2dp) O b.12.65 (2dp) O C. 40 O d. 80

The random variable X denotes the number of speed camera photos taken on a stretch of road. X is assumed to be a Poisson random variable. On average 40 photos are taken each hour. The standard deviation of the number of speed camera photos taken in 2 hours is: QUESTION 4 O a. 8.94 (2dp) O b.12.65 (2dp) O C. 40 O d. 80

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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questions 4 5 and 6 , they are multichoice. thank you

The random variable X denotes the number of speed camera photos taken on a stretch of road. X is assumed to be a Poisson random variable. On average 40 photos are taken each hour. The standard deviation of the number of speed camera photos taken in 2 hours is: QUESTION 4 O a. 8.94 (2dp) O b.12.65 (2dp) O C. 40 O d. 80 A pediatrician wishes to recruit 4 women, each of whom is expecting their first child, to participate in a new natural childbirth regime. Let p denote the probability of a randomly selected woman agreeing to participate and assume that p is constant across the population of relevant women. The random variable that counts the number of women who must be asked before 4 are found who agree to participate is: QUESTION 5 O a. binomial(4.p) O b. geometric(0.25) O C. negative binomial(4,p) O d. Poisson(4) QUESTION 6 Event A has P(A) = 0.1. The odds against A are: O a. g to 1 O b.10 to 1 O C. 1 to 1 O d. 1 to 10
Transcribed Image Text:The random variable X denotes the number of speed camera photos taken on a stretch of road. X is assumed to be a Poisson random variable. On average 40 photos are taken each hour. The standard deviation of the number of speed camera photos taken in 2 hours is: QUESTION 4 O a. 8.94 (2dp) O b.12.65 (2dp) O C. 40 O d. 80 A pediatrician wishes to recruit 4 women, each of whom is expecting their first child, to participate in a new natural childbirth regime. Let p denote the probability of a randomly selected woman agreeing to participate and assume that p is constant across the population of relevant women. The random variable that counts the number of women who must be asked before 4 are found who agree to participate is: QUESTION 5 O a. binomial(4.p) O b. geometric(0.25) O C. negative binomial(4,p) O d. Poisson(4) QUESTION 6 Event A has P(A) = 0.1. The odds against A are: O a. g to 1 O b.10 to 1 O C. 1 to 1 O d. 1 to 10
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