If X and Y are random variables with variances σ = 3 and σ = 9, X and Y are not independent, and oxy = 1, then find the variance of the random variable Z = -9X+8Y-7. Q II 2N b

Q: If the variances for independent random variables X and Y is Var(X)=0.15 and Var(Y)=5.62 then Var…

A: Given that  Var(X)=0.15 Var(Y)=5.62

Q: 2. In the random effects model, the null hypothesis is about the variance of the effects of the…

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Q: Let X and Y be independent random variables with means ux, μy and variances o, oy. Find an…

A: Given:  Random variable x and y are independent with means ux, uy  , varience σ2(x) and σ2(y)  E(x)=…

Q: We have a random variable Y which has an unknown variance. In order to estimate the variance of Y we…

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Q: Practice Question 2: Let X, a random variable with expected value (mean) E(X)= 17 and variance V(X₁)…

A: Hi! Thank you for the question. As per the honor code, we are allowed to answer three sub-parts at a…

Q: Solve the two simultaneous equations to show how Q and P depend on u and v.

A: From given data we have; Demand:            Qd=β0+β1P+u ,Supply:            Qs=γ0+vMean:…

Q: If the range of X is the set {0,1,2,3,4} and given that each outcomes are equally like to occur,…

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Q: Question 8. Let X and Y be random variables with Var(X) 1, Var(Y) 3, and Var(X-Y)3D4. The…

A: Solution: From the given information,

Q: E and F are independent variables with variances of 7 and 9, respectively. Given this, Var(2E - F +…

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Q: Suppose the variance of the difference of two random variables X and Y is zero. Then, show that X =…

A: A random variable is a function that associates a real number with each element in the sample space.…

Q: Given r= 0.5 Ery = 90 variance of y = 36, Er= 100, then find N.

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Q: If X is an unknown with the only possible values 11,12,13,14, or 15, and all are equally likely as…

A: Given that, X is an unknown  with all possible values 11, 12, 13, 14 or 15. These given values of X…

Q: Find the (а) теаns (b) varignces

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Q: a. Determine the variance of 2

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Q: Suppose that the probability that a patient admitted in a hospital is diagnosed with a certain type…

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Q: Let X and Y be independent random variables with means x,y and variances o, oy. Find an expression…

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Q: if X is a normal random variable with mean u = 3 and variance 62 = 16, find P(X >3), P(X>-1)

A: Mean=3, variance=16

Q: Two zero-mean random variables X and Y have variances o =9 and o = 4. The %3D correlation…

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Q: If the correlation between X and Y is zero A. r squared would be 1 B. r squared would be zero C. The…

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Q: Solve the two simultaneous equations to show how Q and P depend on u and v.

A: From given information we have given: The demand for a commodity is : Qd=β0+β1P+uWhere,Q denotes…

Q: Q2// On a certain day an executive received fifteen telephone calls. The distribution of the time…

A: Solution: Let X represent the time spent on a call (in minutes)

Q: Let X and Y and Z are uncorrelated random variables with the same variance. Find the correlation…

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Q: 1) Suppose random variable X - N(2,4) (normal distribution with mean 2 and variance 4). Suppose…

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Q: The variance of the random variable aX is equal to a times the variance of X.

A: The variance of the random variable aX is equal to a2 times the variance of X i.e.  We have to prove…

Q: Consider two independent random variables X and Y with Means of 17 for the first variable is 1 and…

A: Let the new variable be Z  = 3X  - 4Y   The mean is given by E(Z) =3E(X) - 4E(Y) E(Z) = 3(17) -…

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: 4. Let X be a random variable and c and d two real constants. Without recurring to variance…

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Q: In a college,there are 20 major subjects and 40 minor subjects,these are divided into 20 groups of 2…

A: Probability is a branch of mathematics or statistics which is basically deals with the chances of…