SOLUTION: Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.1 0.1 0.8 Please show al

Algebra ->  Probability-and-statistics -> SOLUTION: Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.1 0.1 0.8 Please show al      Log On


   

Question 402641: Find the mean and standard deviation of the following probability distribution:

x 1 2 3
P(x) 0.1 0.1 0.8
Please show all of your work.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
mu+=+0.1+%2B+0.2+%2B+2.4+=+2.7
sigma%5E2+=+E%28X%5E2%29+-+mu%5E2+=+0.1+%2B+0.4+%2B+7.2+-+2.7%5E2+=+0.41
==> sigma+=+sqrt%280.41%29+=+0.64, to 2 decimal places.