# How do I find the expected value on a TI 84?

Table of Contents

## How do I find the expected value on a TI 84?

Expected Value/Standard Deviation/Variance

- Enter data into L1 and L2 as in the above.
- Press STAT cursor right to CALC and down to 1: 1-Var Stats.
- When you see 1-Var Stats on your home screen, add L1,L2 so that your screen reads 1-Var Stats L1,L2 and press ENTER.
- The expected value is the first number listed : x bar.

## How do you find the probability distribution on a TI 84?

Open “DISTR” by pressing “2ND” and “VARS” to launch the probability distributions menu. Select the type of probability distribution you wish to use, most commonly being the normal probability distribution, which can be selected by highlighting “normalpdf(” and pressing “ENTER”.

**How do you find variance and expected value on a TI 84?**

First, we will enter the data.

- Press Stat, then press EDIT. Then enter the data values in column L1 and their probabilities in L2:
- Once you press Enter, the following values will appear in column L3:
- Once you press Enter, the expected value will be displayed:

**How do you find the expected value with only the mean and standard deviation?**

For each value x, multiply the square of its deviation by its probability. (Each deviation has the format x – μ). The mean, μ, of a discrete probability function is the expected value. The standard deviation, Σ, of the PDF is the square root of the variance.

### How do you enter a matrix into a TI 84?

To enter a matrix, press [2ND] and [x−1]. Use the right arrow key to go to the EDIT menu. Press enter to select matrix A. Type in the size of the matrix and the values by typing each number and pressing [ENTER].

### How do you find variance on a TI 84?

How is variance calculated on the TI-84 Plus Family of graphing calculators?

- • Press [2nd] followed by [QUIT]
- • Down arrow to Calculate and press [ENTER]
- • Press [VARS]
- Note: The variance( command will find the sample variance which is the sample standard deviation of x raised to the power of 2.

**Is mean and expected value the same?**

Expected value is used when we want to calculate the mean of a probability distribution. This represents the average value we expect to occur before collecting any data. Mean is typically used when we want to calculate the average value of a given sample.

**Can TI 84 calculate standard deviation?**

Standard deviation can be calculated using several methods on the TI-83 Plus and TI-84 Plus Family. Standard deviation can be calculated by using the stdDev() function.