Question 46 (2 points)

Consider a binomial distribution where the probability of a successful outcome is .2. Assume there are 10 trials. The variance is

Question 46 options:

.81.6.48.2

Question 47 (2 points)

Let X and Y be independent random variables. Then

Question 47 options:

Pr( X = x Y = y) = Pr( X = x) + Pr(Y = y) and Var( X + Y ) = Var( X )Var(Y )Pr( X = x Y = y) = Pr( X = x) Pr(Y = y) and Var( X + Y ) = Var( X )Var(Y )Pr( X = x Y = y) = Pr( X = x) + Pr(Y = y) and Var( X + Y ) = Var( X ) + Var(Y )Pr( X = x Y = y) = Pr( X = x) / Pr(Y = y) and Var( X + Y ) = Var( X ) / Var(Y )Pr( X = x Y = y) = Pr( X = x) Pr(Y = y) and Var( X + Y ) = Var( X ) + Var(Y )

Question 48 (2 points)

The following output from a standard regression program is used in this question.

The regression equation is Y = 0.78 + 1.03 X

PredictorCoefSE CoefTPConstant0.7842.2930.340.741X1.03160.19755.220.001

Analysis of Variance

SourceDFSSMSFPRegression1370.35370.3527.290.001Residual Error8108.5513.57Total9478.90

The standard error of estimate is approximately

Question 48 options:

.743.68.005.5519.24

Question 49 (2 points)

Consider a binomial distribution where the probability of a successful outcome is .2. Assume there are 10 trials. What is the approximate probability of exactly two successes?

Question 49 options:

.10.15.25.30.20

Question 50 (2 points)

Assume that a fund manager has no idea about what he or she is doing and is flipping a coin in order to make decisions. Lets say its a 50/50 proposition that he or she will have a good year. What is the approximate probability that the fund manager will have 7 or more good years out of 10?

Question 50 options:

.27.17.30.25.10

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