Question 1141830: Referring to the information below, what is the standard deviation of the number of calls the doctor's answering service could expect to receive?
The probabilities that a doctor's answering service will receive 0, 1, 2, 3, 4, 5, 6, or 7 calls for him during lunch hour are, respectively, 0.001, 0.006, 0.022, 0.052, 0.091, 0.128, 0.149, and 0.551.
Answer by ikleyn(52909)   (Show Source):
You can put this solution on YOUR website! .
1. Open your textbook and find there the formula for the standard deviation.
If you have not a textbook in your possessing, find this formula in the Internet.
2. Then make all necessary calculations ON YOUR OWN, following to the formula.
Happy calculations !
And memorise it, P L E A S E !
Making calculations is the students' honor duty and a privilege !
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As a pleasant bonus, I can point you websites with free of charge solvers
https://www.algebra.com/algebra/homework/Probability-and-statistics/sample-standard-deviation.solver
https://www.calculator.net/standard-deviation-calculator.html
http://www.alcula.com/calculators/statistics/standard-deviation/
There are TONS of them in the Internet . . .
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