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)
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
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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