(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I have a table with a data set #, and 2 variables (W and P) with values in the table.

2. Relevant equations

The equation (which I don't know what it means) says V= (summation with n on top and i=1 below Wi X Pi)/(summation with n on top and i=1 on bottom X Pi)

3. The attempt at a solution

What are the summations meaning and what do the subscript "i"'s mean?

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# Homework Help: A Couple of Probability & Statistics Questions

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