What is the standard deviation
A discete random variable has a mean of 400 and variance of 64. What is the standard deviation?
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You and Bob are enrolled together in a course on financial management. You missed the class last Friday, and Bob copied his lecture notes for you to study.
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A statistics profressor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 60.0 minutes. Find the probability that a given class period runs great than 50.5 minutes.
Gaussian with mean 1 and variance 2 if y is red and uniformly distributed between 1 and 1 if y is blue. Find the individual and joint pdf of {x, y}. Find also Ex and E (x l y).
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