Homework Help Forum: Statistics

Posted by Chinadoll on Monday, October 26, 2009 at 2:28pm.

Suppose that the probability distribution of a random variable x can be described by the formula P(x) = x/15 For each of the values x = 1, 2, 3, 4, and 5. For examples, then, p(x=2) = p(2) = 2/15 a Write out the probability distribution of x. b Show that the probability distribution of x satisfies the properties of a discrete probability distribution. c Calculate the mean of x. d Calculate the variance and standard deviation. In each case, sketch the two specified normal curves on the same set of axes: A normal curve with µ = 20 and o = 3, a normal curve with µ = 20 and o = 6.

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