How to Find Mean, Median, and Mode on TI-84 Calculator

Finding the mean, median, and mode on a TI-84 is easy once you know where to enter your data. The TI-84 can find the mean and median with 1-Var Stats, but it does not usually show the mode directly. You can find the mode by checking which number appears most often in your list.

This guide shows the steps clearly with an example, so you can enter your data, read the results, and avoid common mistakes.

Quick Answer

To find the mean and median on a TI-84 calculator, enter your numbers into a list and run 1-Var Stats. The official TI-84 Plus guidebook lists 1-Var Stats as the calculator feature used for one-variable statistics.

1. Press STAT.
2. Choose 1: Edit.
3. Enter your numbers into L1.
4. Press STAT again.
5. Move right to CALC.
6. Choose 1: 1-Var Stats.
7. Select or type L1.
8. Press ENTER.
9. Look for x̄ to find the mean.
10. Scroll down to Med to find the median.

To find the mode, look at your list and find the number that appears most often. If the list is long, sort it first so repeated numbers are easier to see.

What Mean, Median, and Mode Mean

Before using the calculator, it helps to understand what each value means.

Mean

The mean is the average of a data set. To find it by hand, add all the numbers and divide by how many numbers there are.

For example, the mean of 4, 6, and 8 is 6 because 4 + 6 + 8 = 18, and 18 ÷ 3 = 6.

Median

The median is the middle number when the data is in order. If there are two middle numbers, add them and divide by 2.

For example, in the data set 3, 5, 9, the median is 5.

Mode

The mode is the number that appears most often.

For example, in the data set 2, 4, 4, 7, 9, the mode is 4 because it appears two times.

A data set can have one mode, more than one mode, or no mode.

How to Enter Data Into a TI-84

First, enter your numbers into a list. Most students use L1 unless a teacher gives different instructions.

1. Press STAT.
2. Select 1: Edit.
3. Move to L1.
4. Type the first number.
5. Press ENTER.
6. Continue entering the rest of your numbers.

If old numbers are already in L1, clear them before entering your new data. Old data can make your answer wrong.

How to Find the Mean on a TI-84

After your data is in L1, use 1-Var Stats to find the mean.

1. Press STAT.
2. Move right to CALC.
3. Choose 1: 1-Var Stats.
4. Choose L1 if your calculator asks for a list.
5. Press ENTER.

On the results screen, look for x̄. This symbol means the mean, or average.

How to Find the Median on a TI-84

The median appears on the same 1-Var Stats results screen.

1. Run 1-Var Stats.
2. Use the down arrow to scroll.
3. Look for Med.

Med is the median of your data set.

The same screen may also show values like minimum, Q1, Q3, and maximum. These are useful when working with five-number summaries or box plots.

How to Find the Mode on a TI-84

The TI-84 usually does not show the mode directly in the 1-Var Stats results. To find the mode, check which number appears most often in your list.

Method 1: Check the List Manually

This method works well for short data sets.

1. Look at the numbers in L1.
2. Count repeated values.
3. The number that appears most often is the mode.

Example: In the data set 5, 6, 6, 8, 9, the mode is 6.

Method 2: Sort the List First

Sorting the list can make repeated numbers easier to spot. Texas Instruments also explains that SortA( sorts a list in ascending order) and SortD( sorts a list in descending order.

1. Press STAT.
2. Choose 2: SortA( to sort from smallest to largest.
3. Press 2nd.
4. Press 1 to enter L1.
5. Type ).
6. Press ENTER.
7. Press STAT.
8. Choose 1: Edit.
9. Look at L1 and find the number that appears most often.

SortA( sorts the list in ascending order. SortD( sorts the list in descending order.

Example: Find Mean, Median, and Mode on a TI-84

Use this data set:

4, 6, 6, 8, 10, 12, 12, 12

Step 1: Enter the Data

Press STAT, choose Edit, and enter the numbers into L1.

Step 2: Run 1-Var Stats

Press STAT, move to CALC, then choose 1: 1-Var Stats. Use L1 and press ENTER.

Step 3: Read the Mean

Look for x̄. For this data set, the mean is 8.75.

You can check it by adding all the numbers: 4 + 6 + 6 + 8 + 10 + 12 + 12 + 12 = 70. Then divide by 8. The answer is 8.75.

Step 4: Read the Median

Scroll down and look for Med. For this data set, the median is 9.

The two middle numbers are 8 and 10. Their average is 9.

Step 5: Find the Mode

Look at the data set again:

4, 6, 6, 8, 10, 12, 12, 12

The number 12 appears three times, so the mode is 12.

Common Mistakes to Avoid

Leaving Old Numbers in L1

If old data is still in L1, your calculator may give the wrong answer. Clear the list before entering a new data set.

Using the Wrong List

If your data is in L1, make sure 1-Var Stats uses L1. If you choose another list, the result may be wrong.

Not Scrolling Down for the Median

The mean appears near the top of the results screen. The median appears lower as Med. Use the down arrow to find it.

Expecting the TI-84 to Show Mode Automatically

The TI-84 does not usually list the mode in 1-Var Stats. Sort the list or count repeated values yourself.

Forgetting What x̄ Means

The symbol x̄ means the mean. Many students miss this because the calculator does not write the word “mean.”

Can You Use an Online Calculator Instead?

Yes. If you do not have your physical calculator nearby, you can use the online TI-84 style calculator to practice entering lists and checking statistics steps.

This is helpful when you want to follow the guide while working on homework or checking your statistics answers.

Related TI-84 Statistics Guides

After publishing more statistics guides, link to these related pages from this article:

• How to Use 1-Var Stats on a TI-84
• How to Enter Data Into a TI-84
• How to Clear Lists on a TI-84
• How to Find Standard Deviation on a TI-84
• How to Make a Box Plot on a TI-84
• TI-84 Dim Mismatch Error

FAQs

What does x̄ mean on a TI-84?

On a TI-84, x̄ means the mean, or average, of your data set. You can find it by entering your data into a list and running 1-Var Stats.

Where is the median on a TI-84?

The median appears as Med in the 1-Var Stats results. You may need to scroll down to see it.

Does the TI-84 show the mode?

The TI-84 does not usually show the mode directly in 1-Var Stats. To find the mode, check which value appears most often in your data list.

How do I enter data into a TI-84?

Press STAT, choose 1: Edit, and enter your numbers into L1. Press ENTER after each number.

Why is my TI-84 giving the wrong mean?

Your calculator may be using old data, or you may have selected the wrong list. Clear old numbers from L1 and make sure 1-Var Stats is using the correct list.

Can a data set have more than one mode?

Yes. If two or more numbers appear the same highest number of times, the data set has more than one mode.

What if no number repeats?

If no number repeats, the data set has no mode.