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Let X1, X2 be a random sample of size 2 from a population X with E(X)=mu and V(X) = 36. Let T1 = (2X1 + X2)/3 and T2 = (3X1 - X2)/3 be two unbiased estimators for mu.
a) Find V(T2)
b) Given V(T1) = 20, select (say why) the estimator you prefer among T1 and T2.
Results sufficient to conclude that the self-hypnosis has a significant effect? Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use a = .05.
Compute the length-of-life value for which 10% of the watch's batteries last longer.
Medication, 47% take cholesterol-lowering medication, and 12% take both medications. What is the probability that a senior citizen takes either blood pressure-lowering or cholesterol-lowering medication?
question suppose that the price of stock a is aed 25 and its standard deviation is 5. the average market price for all
A random variable X has the Pareto (α, θ) distribution (where α > 0, θ > 0) if F_X(x) = 1 - (θ/(θ+x))^α for x ≥ 0. For a fixed d > 0, let Y = X-d | X >d. Calculate F_Y(y) and EY.
You are conducting a study on what socio-demographic factors could be behind the behavioral problems of students. You are looking at how many times a student was sent to detention. You have information on race, gender, household median income, single..
Consider the following estimated regression equation, based on 10 observations.
The Texas Transportation Institute at Texas A&M University conducted a survey to determine the # of hours per year drivers waste sitting in traffic.
in the department of education at ur university student recooreds suggest that the population of students spends an
questioncurrent weekly demand forecast for an item follows a normal distribution with a mean of 100 units with a
What are the two ways of testing a correlation coefficient for significance?
in answering a question on a multiple-choice test a student either knows the answer or guesses. let p be the
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