SOLUTION: Please help me solve this problem! Thank you! A hospital researcher is interested in the number of times the average post-op patient will ring the nurse during a 12-hour shift.

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Question 1203228: Please help me solve this problem! Thank you!
A hospital researcher is interested in the number of times the average post-op patient will ring the nurse during a 12-hour shift. For a random sample of 50 patients, the following information was obtained.
x 0 1 2 3 4 5
P(x) 3/50 9/50 17/50 14/50 6/50 1/50

Determine the expected value μ=?

Answer by greenestamps(13209) About Me  (Show Source):
You can put this solution on YOUR website!


Directly from the definition of expected value....

(3/50)*0 + (9/50)*1 + (17/50)*2 + (14/50)*3 + (6/50)*4 + (1/50)*5

or, for easier computation,

((3*0 + 9*1 + 17*2 + 14*3 + 6*4 + 1*5)/50