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An instructor asked 5 students how many hours they had studied for an exam. Here are the hours and the students grades
What is the expectation, covariance, correlation and and covariance coefficient?
Consider a random sample of size n from a distribution with CDF (cumulative distribution function) F(x)=1-1/x if , and zero otherwise.
The expected rate of return on an investment with a beta of 2 is twice as high as the expected rate of return of the market portfolio.
For the set of numbers given: 9, 8, 7, 27, 16, 3, 1, 9, 4 and 16 determine:
X has the U(-?/2, ?/2) distribution, and Y = tan(X). Show that V has density l/(?(1 + y2)) for ?oo
Let X be a random variable having expected value (mu) and variance (sigma)^2. Find the expected value and variance of:
A Stock's return has the following distribution:
The healthcare environment would be advised to use the MAD, MSE, and the MAPE as measures of forecasting accuracy.
A stock's return has the following distribution:
The following sample observations were randomly selected.
The Barron Big Money Poll asked 131 investment managers across the United States about their short-term investment outlook (Barrons, October 28, 2002).
What is the relationship between the variance and the standard deviation?
Expireall Corporation is in the finishing business. The following data took place during September:
(Beta and required return) The riskless return is currently 6%, and Chicago Gear has estimated the contingent returns given here.
Suppose there is a third security ©, with these characteristics: E(Rc) = 10%; Ï?2=0.20; Pac=0.78; and Pbc = 0.56. Construct the quadratic program
A telemarketing firm has studied the effects of two factors on the response to its television advertisements.
XYZ Products uses a standard costing system to assist in the evaluation of operations.
Given the following data for Rene Company, compute (A) total manufacturing costs and (B) cost of goods manufactured:
If Larry gets a 70 on a physics test where the mean is 65 and the standard deviation is 5.8, where does he stand in relation to his classmates?
For the following scores find the mean,median,sum of squared deviation,variance and standard deviation
Lion Company's direct labor costs for the month of January were as follow:
"It certainly is nice to see that small variance on the income statement after all the trouble we've had lately in controlling manufacturing costs,"
Order Up, Inc., provides order fulfillment for dot.com merchants. The company maintains warehouses that stock items carried by its dot.com clients
Let four random variables X1, X2, X3, X4 have common mean m1=m2=m3=m4= 5 and common variance (sigma 1)^2= (sigma 2)^2