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.

Algebra ->  Probability-and-statistics -> 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.       Log On


   

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) About Me  (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) About Me  (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.