SOLUTION: Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.1 0.2 0.7 Please show all of your work.

Algebra ->  Probability-and-statistics -> SOLUTION: Find the mean and standard deviation of the following probability distribution: x 1 2 3 P(x) 0.1 0.2 0.7 Please show all of your work.       Log On


   

Question 417679: Find the mean and standard deviation of the following probability distribution:

x 1 2 3
P(x) 0.1 0.2 0.7

Please show all of your work.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
mean = mu+=+1%2A0.1+%2B+2%2A0.2+%2B+3%2A0.7+=+2.6
variance =
==> standard deviation = sigma+=+sqrt%280.44%29+=+0.6633, to 4 decimal places.