Question

In: Statistics and Probability

1. If the random variable x has a Poisson Distribution with mean μ = 53.4, find...

1. If the random variable x has a Poisson Distribution with mean μ = 53.4, find the maximum usual value for x.
Round your answer to two decimal places.

2.

In one town, the number of burglaries in a week has a Poisson distribution with mean μ = 7.2. Let variable x denote the number of burglaries in this town in a randomly selected month. Find the smallest usual value for x. Round your answer to three decimal places.

(HINT: Assume a month to be exactly 4 weeks)

Solutions

Expert Solution

Solution:

Question 1) Given:  the random variable x has a Poisson Distribution with mean μ = 53.4.

For Poisson distribution: Mean = Variance = μ = 53.4.

Standard Deviation of Poisson distribution is:

We have to find the maximum usual value for x.

Maximum usual value for x =

Maximum usual value for x =

Maximum usual value for x =

Maximum usual value for x =

Question 2)

Given:  the number of burglaries in a week has a Poisson distribution with mean μ = 7.2.

x =  the number of burglaries in this town in a randomly selected month.

Since mean is given for a week and x is defined per month, so we need to find mean number of burglaries in a month.

For a month number of weeks = 4

Thus new mean = 4 * μ = 4 * 7.2 = 28.80

and

Thus

The smallest usual value for x =

The smallest usual value for x =

The smallest usual value for x =

The smallest usual value for x =

The smallest usual value for x =

The smallest usual value for x =


Related Solutions

Let X have a Poisson distribution with mean μ . Find E(X(X-1)) and use it to...
Let X have a Poisson distribution with mean μ . Find E(X(X-1)) and use it to prove that μ = σ 2 .
Let the random variable X follow a normal distribution with a mean of μ and a...
Let the random variable X follow a normal distribution with a mean of μ and a standard deviation of σ. Let 1 be the mean of a sample of 36 observations randomly chosen from this population, and 2 be the mean of a sample of 25 observations randomly chosen from the same population. a) How are 1 and 2 distributed? Write down the form of the density function and the corresponding parameters. b) Evaluate the statement: ?(?−0.2?< ?̅1 < ?+0.2?)<?(?−0.2?<...
Suppose that x has a Poisson distribution with μ = 22. (a) Compute the mean, μx,...
Suppose that x has a Poisson distribution with μ = 22. (a) Compute the mean, μx, variance, σ2xσx2, and standard deviation, σx. (Do not round your intermediate calculation. Round your final answer to 3 decimal places.)   µx = , σx2 = , σx = (b) Calculate the intervals [μx ± 2σx] and [μx ± 3σx ]. Find the probability that x will be inside each of these intervals. Hint: When calculating probability, round up the lower interval to next whole...
Let Y denote a random variable that has a Poisson distribution with mean λ = 6....
Let Y denote a random variable that has a Poisson distribution with mean λ = 6. (Round your answers to three decimal places.) (a) Find P(Y = 9). (b) Find P(Y ≥ 9). (c) Find P(Y < 9). (d) Find P(Y ≥ 9|Y ≥ 6).
2] Let x be a continuous random variable that has a normal distribution with μ =...
2] Let x be a continuous random variable that has a normal distribution with μ = 48 and σ = 8 . Assuming n N ≤ 0.05 , find the probability that the sample mean, x ¯ , for a random sample of 16 taken from this population will be between 49.64 and 52.60 . Round your answer to four decimal places.
Let x be a continuous random variable that has a normal distribution with μ = 60...
Let x be a continuous random variable that has a normal distribution with μ = 60 and σ = 12. Assuming n ≤ 0.05N, where n = sample size and N = population size, find the probability that the sample mean, x¯, for a random sample of 24 taken from this population will be between 54.91 and 61.79. Let x be a continuous random variable that has a normal distribution with μ = 60 and σ = 12. Assuming n...
1. Let X be a random variable with mean μ and variance σ . For a...
1. Let X be a random variable with mean μ and variance σ . For a ∈ R, consider the expectation E ((X − a)2) a) Write E((X −a)2) in terms of a,μ and σ2 b) For which value a is E ((X − a)2) minimal? c) For the value a from part (b), what is E ((X − a)2)? 2. Suppose I have a group containing the following first- and second-year university students from various countries. The first 3...
Consider a continuous variable x that has a normal distribution with mean μ = 17.8 and...
Consider a continuous variable x that has a normal distribution with mean μ = 17.8 and standard deviation σ = 4.2. Answer the following questions. Approximate everything to 4 decimal places. P(x≤17)=P(x≤17)= P(x≥18)=P(x≥18)= P(15<x<19)= The value of x such that the area to your left under the normal curve is 0.3358 is: The value of x such that the area to your right under the normal curve is 0.2288 is: The 80th percentile is: Quartile 2 is:
1) A normal random variable x has an unknown mean μ and standard deviation σ =...
1) A normal random variable x has an unknown mean μ and standard deviation σ = 2. If the probability that x exceeds 4.6 is 0.8023, find μ. (Round your answer to one decimal place.) μ = 2) Answer the question for a normal random variable x with mean μ and standard deviation σ specified below. (Round your answer to four decimal places.) μ = 1.3 and σ = 0.19. Find P(1.50 < x < 1.71). P(1.50 < x <...
X is a random variable following Poisson distribution. X1 is an observation (random sample point) of...
X is a random variable following Poisson distribution. X1 is an observation (random sample point) of X. (1.1) Please find probability distribution of X and X1. Make sure to define related parameter properly. (1.2) Please give the probability distribution of a random sample with sample size of n that consists of X1, X2, ..., Xn as its observations. (1.3) Please give an approximate distribution of the sample mean in question 1.2(say, called Y) when sample size is 100 with detailed...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT