SOLUTION: On the midnight shift, the number of patients with head trauma in an emergency room has the probability distribution shown below. (a) Calculate the mean and standard deviation.

Question 253864: On the midnight shift, the number of patients with head trauma in an emergency room has the probability distribution shown below. (a) Calculate the mean and standard deviation.
x 0 1 2 3 4 5 Total
P(x) .05 .30 .25 .20 .15 .05 1.00
Is there a way to enter this data in Excel to calculate mean and std. deviation?
Thank you!
Found 2 solutions by stanbon, jim_thompson5910:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
(a) Calculate the mean and standard deviation.
x..... 0.. 1.. 2.. 3.. 4.. 5 Total
P(x) .05 .30 .25 .20 .15 .05 1.00
===============================
I used a TI calculator.
The results:
mean::: 2.7123...
std:::: 1.2329
======================
Cheers,
Stan H.

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
See this page for the formulas for the mean and std deviation of a probability distribution.
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