(d) Compute the standard deviation of the random variable X. %3D hits

Q: 8. Calculate the mean u, second moment, and the variance o? of the random variable X, representing…

A:

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A: pmf of poisson distribution is = f ( k ) = e^-k  k^x / x!where       k  = parameter of the…

Q: e. Find the standard deviation of the random variable X.

A: A random Sample of 200 residents; n=200 p=0.254

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A: Let , P(X=3) = θ then, P(X=1) =15θ P(X=2) =14θ P(X=4) =13θ

Q: 6 - A fair coin is tossed three times (consecutively). What is the variance of X if X is the number…

A:

Q: Tunct If X-b(n, p), find the mean and variance for the random variable X n

A:

Q: 0.064. At a = 0.005, is there enough evidence to reject the claim?

A: HERE GIVEN , sample variance  = s2 =  0.064 sample size  n = 28  significance level = 0.005

Q: x is a normally distributed random variable with a mean of 3 and a variance of 4. Find the…

A: Given that X follows a normal distribution with mean=3 and variance=4. So standard deviation=4=2We…

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A: The question is about discrete probability distribution.Given :

Q: and let Consider a random variable X with the following distribution r 13 4 7 8 P(X=x) 0.2 0.25 0.1…

A: (a) To calculate the mean of X, we multiply each value of X by its corresponding probability and sum…

Q: (a) Can a binomial random variable X have a mean = 7 and the variance = 11. Why or why not? %3D

A: The probability distribution function of binomial random variable x is given by P(x)=n!x!…

Q: Suppose, you are running an experiment that has two outcomes, namely 'success' and 'failure'. You…

A: Follow Geometric distribution - Let X be number of trials to get first success or X ~ Geo(p)

Q: A binomially distributed random variable has the following parameters: P = 0.48, n = 58 Find the…

A: Answer: From the given data, The distribution is binomial with parameters p = 0.48, n = 58

Q: Jessica hypothesizes that giraffes will look longer at human infants than at adults. In her zoo, she…

A: It is given that Jessica hypothesizes that giraffes will look longer at human infants than at adults…

Q: 5. A part-time employee works for 1, 2 or 3 hours per day, each with a probability of 1/3. The…

A: 5) Given information: A part-time employee works for 1, 2 or 3 hours per day, each with a…

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A: Given :  An electronic scale at an automated filling operation stops the manufacturing line after…

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A: We have to find correct answer from given options..

Q: Expected value  b Variance c Standard Deviation

A: Here prepare probability table with required column

Q: Find the variance of a binomial distribution when p = 73% and n = 205. (

A: Note :- Variance=np(1-p) in our question Given that p=73%=.73 And n=205 So

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A:

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A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

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A: A normal distribution is the symmetric distribution about its mean with the bell shaped curve. If a…

Q: 10. If the distribution function of the random variable X is given by 0 #+1 2 F(X)= 1 then P(-3 <…

A: B) 3/4

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A: We have given that,  If the F-statistic is large, then they variance ___ is much larger than the…

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A: Given: Probability distribution of Y. The variance of random variable Y is obtained as below:…

Q: - If the random variable X from a distribution with mean 70 and variance 9 find the mean and…

A: Given :-   EX = 70VarX = 9And ,   Y =-2X+5and , Z=X-703   we have to find EY , VarY and EZ , VarZ…

Q: The expected value of a random variable X that is denoted by u is called its a .variance b.mean C.…

A: The expected value of a random variable X that is denoted by u is called its ?

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A: The variance can be calculated as V(X) = E(X2) - [E(X)]2

Q: The mean and standard deviation of a random variable x are ) and 4 respectively. Find the mean and…

A: Given,mean(μ)=E(X)=0standard deviation(σ)=4variance =σ2=(V(X))=16

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A: The number of dice rolled is 2.

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Q: The random variable X has a binomial distribution with n=20 and p 0.01. What is the mean and…

A: As in binomial distribution  Mean = n*p variance = n*p*(1-p)