SOLUTION: Hi! Can someone please help me with this problem? I have no idea how to do this and I am completely confused. Thank you very much for your help! Consider the probability distr

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Question 632891: Hi! Can someone please help me with this problem? I have no idea how to do this and I am completely confused. Thank you very much for your help!

Consider the probability distribution shown below and answer the following questions. Show calculations for each computation.
x -4 -3 -2 -1 0 1 2 3 4
P(x) 0.02 0.07 .10 .15 .3 .18 .10 .06 .02
Calculate μ
Calculate σ^2 and σ

Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website!

Hi,
Calculate the Expected Value(Sum of PX) = μ = 0
Then Calculate the Variance(Sum of P[X-μ]^2) = 2.94
SD =
X P PX P[X-μ]^2
-4 0.02 -0.08 0.32
-3 0.07 -0.21 0.63
-2 0.1 -0.2 0.4
-1 0.15 -0.15 0.15
0 0.3 0 0
1 0.18 0.18 0.18
2 0.1 0.2 0.4
3 0.06 0.18 0.54
4 0.02 0.08 0.32
Sum 0 2.94