Consider a random variable X with the following probability mass function (PMF) 0.10 if z 0,1, 0.30 ifz 2, 0.50 if r 3, P(z)= otherwise. (a) Verify the above is a valid PMF for the variable X. (b) By directly using the PMF above, find the mean of X. (c) By directly using the PMF above, and your result in (a), find the variance of X. (d) Using the complement rule find P(X 2).
Consider a random variable X with the following probability mass function (PMF) 0.10 if z 0,1, 0.30 ifz 2, 0.50 if r 3, P(z)= otherwise. (a) Verify the above is a valid PMF for the variable X. (b) By directly using the PMF above, find the mean of X. (c) By directly using the PMF above, and your result in (a), find the variance of X. (d) Using the complement rule find P(X 2).
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.4: Expected Value
Problem 1E: If a game gives payoffs of $10 and $100 with probabilities 0.9 and 0.1, respectively, then the...
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