Math (Statistics)

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

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  1. 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.

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  2. 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.

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