Data from 14 cities were combined for a 20-year period, and the total 280 city-years included a total of 153 homicides. After finding the mean number of homicides per city-year, find the probability that a randomly selected city year has the following numbers of homicides, then compare the actual results to those expected by using the Poisson probabilities: Homicides each city-year: 0, 1, 2, 3 ,4 Actual results: 162, 89, 24, 4, 1 P(0)= P(1)= P(2)= P(3)= P(4)= Does the Poisson distribution serve as a good tool for predicting the actual results?

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of female students is 20. Thus, the total number of students is 20+20 = 40.

Q: The time that elapses between failures of an essential piece of equipment is important in deciding…

A: Exponential Distribution: A continuous random variable X is said to follow Exponential distribution…

Q: A group of students consisting of 20 males and 20 females were selected to participate in a research…

A: The number of male students is 20 The number of female students is 20. The total number of students…

Q: of the parts produced by a particular machine, 0.8% are defective. If a random sample of 7 parts…

A: According to the given information, The probability of success in a trial is :-P = 0.8%  =…

Q: What is mean and variance of the probability distribution?

A:

Q: Use the Minitab to simulate 10,000 rolls of two dice. Find the number of times that the sum of the…

A: Given information: It is given that 2 dice should be rolled.

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Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. Use…

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Q: A newspaper survey found that 65% of readers found online tutorials useful. If a random sample of 9…

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Q: The average monthly grocery bill for an individual is normally distributed with a mean of $85 and a…

A: Solution: Let X be the average monthly grocery bill for an individual is normally distributed with…

Q: The rates of on-time flights for commercial jets are continuously tracked by the U.S. Department of…

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Q: The data on the right represent the number of traffic fatalities by seat location and gender.…

A: Given that    Male=M Female =F Total Passenger=P  32928 11919 44847 Driver=D 6339 6206 12545…

Q: Household incomes in the city of Tampa Bay  are right-skewed with an average of 50,270 and standard…

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Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. Use…

A:

Q: If the mean time is between unscheduled maintained of lcd displays in a hospital scan facility is…

A: We have given that λ = 1/4000 Let X is a random variable shows the time ofunscheduled maintenance.…

Q: Suppose a large consignment of televisions contained 11% defectives. If a sample of size 237 is…

A:

Q: A recent survey reported that 50​% of​ 18- to​ 29-year-olds in a certain country own tablets. What…

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Q: Which of the following techniques can be used to assess probabilities for very rare events? A.…

A: The correct option is Fault trees Reason; By using the fault tree technique, we can assess the…

Q: It is known that for a laboratory computing system the number of system failures during a month has…

A: It is known that for a laboratory computing system the number of system failures during a month has…

Q: Below is a distribution of race in the United States from 2014. White= 60.5% Black= 12.5% Hispanic=…

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Q: In a recent pol, a random sample of aduts in some country (18 years and older) was asked, "Wheni you…

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Q: Given a normal population with mean = 39 and variance = 16, what is the probability of obtaining an…

A:

Q: If the weight assumptions were revised so that the new capacity became 20 passengers and the water…

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Q: Find the standard deviation for each binomial random variable  n=36, ?= .75 n=75, ?= .55 n=26, ?=…

A: Givenn=36 p=0.75x~Binomial(n=36,p=0.75)P(X=x)=(nx)×px×(1-p)n-x    ; x=0,1,...,n

Q: sample of 31 years of rainfall for California and a sample of 49 years of rainfall for New York has…

A: Given information for State of California: Mean, μ=22. Standard deviation, σ=4. Sample size, n=31.…

Q: An online retailer operates two independent warehouses (A & B) where it keeps its inventory. Each…

A: Solution: given that Each warehouse has a .05 probability of experiencing a fire. If a fire is…

Q: Find the probability that at least 44 flights arrive late.

A: Given : n=10 , P(flights arriving on time)=0.8 Therefore , P(flights arriving late)=1-0.8=0.2 Let ,…

Q: A recent survey reported that 47​% of​ 18- to​ 29-year-olds in a certain country own tablets. What…

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Q: A telemarketing firm conducts surveys with a 40% historical response rate. What is the probability…

A:

Q: For each situation given below, do the following: A) Decide if the random variable is Poisson (or…

A: The probability mass function of the Poisson distribution is given as follows:

Q: A Soft drink machine outputs a mean of 25 ounces per elip. The machines output is normally, With a…

A: Given that: Population mean, μ=25 Population standard deviation, σ=4

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.