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## What is the formula to calculate expected value?

The basic expected value formula is the probability of an event multiplied by the amount of times the event happens: **(P(x) * n).**

## How do you find the expected value step by step?

In statistics and probability analysis, the expected value is calculated by **multiplying each of the possible outcomes by the likelihood each outcome will occur and then summing all of those values**. By calculating expected values, investors can choose the scenario most likely to give the desired outcome.

## How do you find the expected value of a data set?

To find the expected value, E(X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as. **E ( X ) = μ = ∑ x P ( x ) .**

## Where is Y1 on TI84?

Graph Y1. Press 2nd [calc] 2 to **select zero**. Note: If more than one graph is displayed press △ until the expression for Y1 appears at the top of the screen. Move the cursor to a point just to the left of a zero (or type in a number less than a zero) and press enter.

## How do you find Y1 and Y2 on a graphing calculator?

The cursor will blink on a function and show the function name in the upper left corner of the screen. When it blinks on Y1, **press ENTER & when it blinks on Y2, press ENTER**.