Let X have a normal distribution with mean 7. If p{X>10}=0.9, what is the variance of...

Let X have a normal distribution with mean 7. If p{X>10}=0.9, what is the variance of X?

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orchestra answered 2 years ago

Let X have Normal distribution with mean 45 and variance 81. If a random sample of...

Let X have Normal distribution with mean 45 and variance 81. If a random sample of size 25 is taken, which of the following is the probability that the sample average is between 41.40 and 45.63?

Let X have mean ? and variance ?^2. (a) What are the mean and variance of...

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Let X be a random variable which follows normal distribution with mean 12 and variance 0.25....

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Suppose x has a normal distribution with a mean of 78 and a variance of 484.00....

Suppose x has a normal distribution with a mean of 78 and a variance of 484.00. If a sample of 19 were randomly drawn from the population, find the probability of for each of the following situations. a) less than 79: probability = b) greater than 85: probability = c) in between 68 and 84: probability = d) in between 77 and 91: probability = Note: Do NOT input probability responses as percentages; e.g., do NOT input 0.9194 as...

Suppose x has a normal distribution with a mean of 79 and a variance of 441.00....

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Let (X1, X2) have a bivariate normal distribution with mean vector (µ1, µ2), variance σ 12...

Let (X1, X2) have a bivariate normal distribution with mean vector (µ1, µ2), variance σ 12 for X1 and σ 2 2 for X2 and correlation cor(X1, X2) = ρ. (a) Write down the joint density f(x1, x2). (b) Find the marginal distribution f(x1) (c) Find the conditional distribution f(x1 | x2) and the mean and variance of the conditional distribution. (d) Obtain the likelihood equations and calculate the MLE for µ1, µ2, σ12 , σ2 2 , ρ.

Let the random variable X is normal with mean zero and unit variance . Find the...

Let the random variable X is normal with mean zero and unit variance . Find the values of A and B such that P(A<X<B)=0.998. A= B=

Compute the mean and variance of the following probability distribution. x P(x) 5................................. .1..

Compute the mean and variance of the following probability distribution.x P(x)5................................. .110............................... .315............................... .220............................... .4

Let Yi equal a normal distribution with mean β + βxi and variance σ2 = 1...

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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?<...

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