4. Which of these processes are stationary? Justify why or why not. a. X=0.6(x-5)+e, b. X = 0.9X c. X = 0.9X t-1 +0.20X₁.2 + e₁ t-2 0.20X-2 + e₁ t-1 d. X₁ = X₁₁₁ + e₁ t-1 e. X₁ = e₁ - e₁-1 - Throughout, let {et} be a white noise process with constant variance o²

A box contains 5 Balls labeled with the number "1", 3 balls labeled with the number "2", and 1 ball labeled with the number "3". Two balls are selected, without replacement. Let X be the total of the values on the two balls. Find the variance of X.

Consider a random walk performed by a drunken person with equal step 1 . Calculate mean and variance of the steps .

Explain Distribution of the F-Statistic using the homoskedasticityonlyestimator of the covariance matrix?

What is the function to got variance sigma 40?

Cynthia, Mary, Mika, and Sallieof Hu’s Ur Dedi Cerveza Corp. conducted a survey on their 12-ounce cans to be sure that the variance of the amount of beer, in each can, was no more than 0.02square ounces. They collected a random sample of twenty cans of their 12-ounce beer, pulled from their production line, and got a sample variance of 0.015square ounces. Assume that the amount of beer in all 12-ounce cans to be normally distributed. Help them: a.Construct a 95% confidence interval for the population variance. b.Construct a 99% confidence interval for the standard deviation.

How to get rid of co-variances double head arrows among the demographic variables in semplot function with R-lavaan package?

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Suppose that Y,, Y2,..,Y, are independent random variables from a gamma distribution of the parameter (2, 6+ 4). c) Show that the estimator B is a minimum variance unbiased estimator of B.

The service times for customers coming through a checkout counter in a retail store are independentrandom variables with mean 1.5 minutes and the variance 1.0. Approximate the probability that 100customers can be served in less than (a) 2 hours (b) 3 hours of total service time.