Texas Instruments TI 36X Pro scientific calculator is one of the most popular and powerful calculators around which allows you to calculate summary statistics as mean and standard deviation.

Though a user guide comes with the TI 36X Pro calculator on how to use the calculator including the method to calculate standard deviation, many users can’t find how to do it.

If you are one of them who is having problems finding standard deviation on your TI 36X Pro calculator then don’t worry, we are here to help you. The complete direction to calculate deviation is described in this article in a simplified way.

Let’s check it out.

Table of Contents

## Method to Calculate Standard Deviation

Before going any further, you need to know the method to calculate the standard deviation. You can find it in 6 steps. Here are they:

**Step 1: **Calculate the mean.

**Step 2: **Calculate the difference between the mean and each data value.

**Step 3: **Square each difference.

**Step 4: **Add the squared values together.

**Step 5: **Divide the sum by the total amount of data in the set.

**Step 6: **Square root the quotient and the ± of this value is the standard deviation.

## How to Find Standard Deviation on TI 36X Pro Calculator?

As you know the method to calculate standard deviation, now let’s see how you can find that using your TI 36X Pro scientific calculator.

You can do it simply in 3 steps:

- Clear data
- Enter data
- Calculate the value

The calculation process for one-variable statistics and two-variable statistics is different. So, both processes are given below.

### 1. For One-Variable Statistics

#### Step 1: Clear All Data

- After turning on the calculator, press the [
**data**] button twice - Then, select a “
**list**” to clear - Finally, press [
**enter**] to clear the data

#### Step 2: Enter Data

- At first, press the [
**data**] button - Then, press the [
**enter**] button - After that, enter values and frequencies into the “
**lists**” - Finally, press the [
**2nd**]button and thenthe**[mode**] button

#### Step 3: Calculate Mean, Standard Deviation, Five Number Summary

- First, press the [
**2nd]**button, and thenthe [**data**]**(stat-reg/distr)**button - Then, select “
**2: 1-Var Stats**” and press [e**nter**] - After that, select the “
**list**” in which you’ve entered the data value - Now, input the value for “
**FRQ**” - If the frequency is not given then select “
**ONE**” for “**FRQ**” - If the frequency is entered in a list, select the “
**List**” for “**FRQ**” - Finally, select “
**CALC**” to obtain the variable information - The mean value is “X” and the standard deviation value is “Sx”.

### 2. For Two-Variable Statistics

#### Step 1: Clear All Data

- After turning on the calculator, press the [
**data**] button twice - Then, select a “
**list**” to clear - Finally, press [
**enter**] to clear the data

#### Step 2: Enter Data

- At first, press the [
**data**] button - Then, press the [
**enter**] button - After that, enter values and frequencies into the “
**lists**” - Finally, press [
**2nd]**and then[**mode**]

#### Step 3: Calculate Linear Regression

- At first, press the [
**2nd]**button and the**[mode**] button - Then, select “
**2: 1-Var Stats**” and press the [**enter**] key - Now, select the “
**lists**” that contain the “X” and the “Y” data value - After that, input the value for “
**FRQ**” - If the frequency is not given then select “
**ONE**” for “**FRQ**” - If the frequency is entered in a list, select the “
**list**” for “**FRQ**” - Finally, press the “
**CALC**” button to obtain the variable information - The slope (b
_{1}) is “a” and the intercept (b_{0}) is “b”.

## Frequently Asked Questions

### How Do I Define Statistical Data Points on a TI-66X Pro Calculator?

- Press [
**data**] and Input 10 under**L1**and then press [**enter**]. Enter all the data points in this way - Then press [2nd] [data] (stat-reg/distr).
- Now, select
**2: 1-Var Stats**. - Then select [L1] for DATA and ONE for FRQ.
- In the end, highlight CALC and press [enter].

### How Do You Find the Standard Deviation on a TI 30X?

- First, press [DATA] and begin to enter the data into the L1, L2, or L3 lists.
- Then, press [2nd], [STAT], and then choose 1-VAR.
- After that choose the
**list**(L1, L2, or L3) from the “DATA” option in which you’ve stored the data. - Now, select “CALC” and press [ENTER].
- Finally, press [2nd] [MODE] to exit STAT mode.

### How Do I Calculate Standard Deviation?

- Find the mean.
- Then, square the distance to the mean for each data point
- After that, sum the values
- Now, divide by the number of data points.
- Finally, square root the quotient.

### How Do I Do Normalcdf on a TI-36X Pro?

- Press the “2nd” and then the “data” button.
- Then, select the DISTR tab using the right arrow.
- Now, choose option
**2: Normalcdf**using the arrow down button and press “enter”. - Finally, input the value of the mean, standard deviation, lower bound, and upper bound, and press “enter” after each entry.

## Conclusion

TI 36X Pro scientific calculator is perfect for calculating mid and big-ranged equations. So, the calculation of standard deviation on this powerful calculator is quite easy and simple. You just need to clear previous data, input new data, and calculate the value of standard deviation as instructed above in this article.

I hope this guide has proven helpful to you. You can bookmark this article in case you need to calculate standard deviation in the future. Have a good time.