Education Technology

# Knowledge Base

## Solution 13327: Using the Mean() Function on the TI-83 Family, TI-84 Plus Family, and TI-Nspire™ Handheld in TI-84 Plus Mode.

### How do I use the mean() function on the TI-83 family, TI-84 Plus family, and TI-Nspire handheld in TI-84 Plus mode?

The syntax for the mean() function is listed below:

mean(list[,freqlist])

The mean() function return the mean or average of list with the frequency list (freqlist). If a freqlist is not specified in the mean() function, the default value for freqlist is 1. Each freqlist element counts the number of consecutive occurrences of the corresponding element in the list. Refer to the examples provided below.

Example: Find the mean of {1,2,3,4}

1) From the main screen, press [2ND] [STAT] to access the LIST menu.
2) Use the arrow keys to scroll to MATH and select 3:mean(.
3) Input {1,2,3,4}).
4) Press [ENTER] for the result of 2.5 to be displayed.

Example: Find the mean of {1,2,3,4} with the freqlist of {2,3,1,2}

1) From the main screen, press [2ND] [STAT] to access the LIST menu.
2) Use the arrow keys to scroll to MATH and select 3:mean(.
3) Input {1,2,3,4} and press [,].
4) Input {2,3,1,2}).
5) Press [ENTER] for the result of 2.25 to be displayed.

Please see the TI-83 family and TI-84 Plus family guidebooks for additional information.

Please Note: TI-Nspire handheld in TI-84 Plus mode users may refer to the TI-84 Plus family guidebook.