I am to find the mean, variance, and standard deviation for the probability distribution. I don't even know where to start. Here is the problem

Question

I am to find the mean, variance, and standard deviation for the probability distribution.  I don't even know where to start.  Here is the problem

x      P(x)
0      0.19
1      0.32
2      0.28
3      0.21

Anonymous · Answer

In google type:
wikipedia mean variance standard deviation

When you see list of results click on pages in list.

Then in google type:
mathisfun Standard Deviation Calculator

When you see list of results click on:
mathsisfuncom/data/standard-deviation-calculator.html

When page be open type your numbers and click ENTER button on your keyboard. You will see result.

Heather · Answer

This is not right. I know how to find the mean, variance, and standard deviation normally. This problem is for probability distribution, which is an entirely different formula.