Addition and Multiplication Formulas for Expected Value and Variance Homework Help

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Addition and Multiplication Formulas for Expected Value and Variance Assignment Help to Make Statistics Easy for You!
With all the complicated equations along with graphical plotting, it is commonplace for students to mess up their Statistics assignments. Most of time, students fail to figure out how to even approach such topics! The trick is not to be afraid and to have deep knowledge about the subject. However, it is easier said than done. With the tension of grades and deadline upon their head, it is natural for students to panic. Because we understand the crisis student’s face, we want to help! Therefore, has brought forward an amazing offer to complete assignments on behalf of students. To be precise, Our Addition and multiplication formulas for expected value and variance Homework Help team can do your assignments while you get to enjoy the grades!

Since it is essential for every student to know the basics of the homework they have been assigned, here we have jotted it down for you!
Addition and multiplication formulas for expected value & variance

Expected Value in statistics is the product of multiplying each outcome with the possibility of occurrence of those outcomes and then adding up the values.

To figure out the Variance, one has to calculate the average of the set of numbers and then subtract this average from each number and square the differences. The average of these squared differences gives out the variance.

Addition and Multiplication formulae for Expected Value & Variance are as follows:
Let us consider X and Y to be random variables, then the formulas would be:
E(X+Y) = E(X) + E(Y)
E(aX) = a.E(X)
Var(X) = E(x^2) – E(〖x)〗^2
Var(aX) = a^2.var(X)
Var(X+a) = var(X)
These equations stand when a € R. When X and Y are independent, there are two more equations:
E(X.Y) = E(X) . E(Y)
Var (X+Y) = Var(X) + Var(Y).
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