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Cumulative Dist. Function

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The attachment represents the cumulative dist. funct. for a random variable x. From the graph, find P(2<=x<=3):

Must be one of the following answers:

a.) 0.6

b.) 0.2

c.) 0.4

d.) 0.8

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The attachment represents the cumulative dist. funct. for a random variable x. From the graph, find P(2<=x<=3):

Must be one of the following answers:

a.) 0.6

b.) 0.2

c.) 0.4

d.) 0.8

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See Also This Related BrainMass Solution

Cumulative Distribution Function, Mean and Variance

A r.v. X is called a Laplace r.v. if its pdf is given by
fx(x) = ke ^(-lambda |x|) lambda>0, -infidenity< x < infidenty
where k is a constant.

(a) Find the value of k.
(b) Find the cdf of X.
(c) Find the mean and the variance of X.

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