Homework Help: Probability

Posted by Julie on Sunday, February 1, 2009 at 9:39pm.

A random variable N has a cumulative distribution function given by

F(x)={ 0 for x<1
0.2 for 1<=x<2
0.5 for 2<=x<3
0.8 for 3<=x<4
1 for 4<=x
Find the mean of N.

Probability - drwls, Monday, February 2, 2009 at 5:27am
The average would be the area under the cumulative distribution, divided by its width. Your last statement,
F(x) = 1 for 4<=x, disagrees with all previous statements.

You will need to resolve that.

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