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April 20, 2015

Homework Help: Math question and answer check

Posted by Gayle 52 on Thursday, June 6, 2013 at 7:18pm.

Consider the probability function. (Give your answers exactly.)

P(x) =
5 − x
10
, for x = 1, 2, 3, 4

(a) Find the mean.
Incorrect: Your answer is incorrect. (my answer was 1).

(b) Find the standard deviation.
(my answer was 1 also on this one. Please help, I just cant get the standard deviation.

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