# How to calculate standard deviation on TI-84?

Calculating the standard deviation on a TI-84 calculator involves a few steps. Here's a general guide on how to do it:

Enter Data: First, you need to enter your data set into the calculator's statistical list (L1, L2, etc.). You can do this by pressing the STAT button, then selecting the list you want to use (e.g., L1), and entering the data points.

Access the Calculate Menu: Press the 2nd button followed by the STAT button to access the CALC menu.

Select the Standard Deviation Option:

For a sample standard deviation, choose 1-VAR and then select 2:StdDev. This calculates the standard deviation for a sample (not the entire population). For a population standard deviation, choose 1-VAR and then select 3:StdDevP. This calculates the standard deviation for an entire population. Enter the List: After selecting the appropriate option, you'll be prompted to enter the list name where your data is stored (e.g., L1).

Execute the Calculation: Press ENTER to perform the calculation. The standard deviation will be displayed on the screen.

Remember that the standard deviation is a measure of the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values tend to be close to the mean of the set, while a high standard deviation indicates that the values are spread out over a wider range.

If you're working with a list that has a large number of data points, you might want to consider using the STAT PLOT to visualize your data and the CALC menu to perform more statistical operations.

Also, make sure your calculator is in the correct mode for your data. If you're calculating for a sample, ensure your calculator is set to STAT mode, and if you're calculating for a population, it should be set to STAT PLOT.

For more detailed instructions or specific functions, you can refer to the user manual of your TI-84 calculator, which often includes step-by-step guides and additional tips for performing various calculations.