SOLUTION: The random variable x represents the number of tests that a patient entering a hospital will have along with the corresponding probabilities. Find the mean and standard deviation.

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Question 1028112: The random variable x represents the number of tests that a patient entering a hospital will have along with the
corresponding probabilities. Find the mean and standard deviation.
x 0 1 2 3 4
P(x) 3/17 5/17 6/17 2/17 1/17
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
, approximately 1.6.
, approximately 3.7.
==> Var%28X%29+=+E%28X%5E2%29+-+%28E%28X%29%29%5E2+=+63%2F17+-+%2827%2F17%29%5E2+=+342%2F289
==> SD+=+sqrt%28Var%28X%29%29+=+sqrt%28342%2F289%29+=+%283sqrt%2838%29%29%2F17, approximately 1.09.