Confidence Intervals and Margin of Error using the TiNSpire CX

To find Confidence Intervals of Proportions using Statistics Made Easy at use option 7

Next, the given proportion po , sample size n and the confidence level alpha as shown below:

Automatically, the correct setup and solution shows in the bottom window.


To also find the sample size given the Margin of Error use option 9:

you will enter the given Margin of Error, proportion and the confidence level Alpha

Again, the correct setup is shown and the sample size is computed step by step, here we get n>=441.7187

Gamma and Beta Function – Step by Step – for the TiNSpire CX

To compute the Gamma Function – Step by Step – using the TiNspire CX start the Differential Equation Made Easy app at  , go to menu option EXTRAS and select GAMMA FUNCTION. You will be prompted to enter value for n as shown below.

Entering in example n=9 yields 8! or 40320 as the Gamma Value.

You may also enter .5 – value such as 4.5 or 9/2 into the Gamma Function, see below.

The Beta Function can easily be computed using the Gamma Function upon entering two values x and y for the Beta Function. Just select BETA FUNCTION under the EXTRAS menu.

Below we are entering x=5 and y = 4 to get the correct Beta Function value of 1/280 :

As you can see the Gamma and Beta Functions can be computed easily using the Differential Equations Made Easy. Values are computed step and step and are always correct. Even for large values of x and y and n .

Convert Bits Bytes Kilobytes Megabytes etc using the TiNspire CX

Converting Bits, Bytes Kilobytes, Megabytes etc can now be done step by step using the TiNspire CX and “Step by Step Unit Converter” at

Some features are:

  1. Convert between Bits, Bytes , KB, MB, GB, TB, Peta Byte, Exabyte and Zettabyte.  (How long will it take take till your computer’s hard drive will be 1 ZB ? )
  2. Select between 1000 bit and 1024 bit conversion
  3. Step by Step 😉

VIDEO: Periodic Table of Elements using the TiNspire

Hi guys! If you need to view information of the elements in the periodic table AND

you own a TiNspire then I have GREAT news for you: Finding element information is as easy as pi!

You can either search by Element name, symbol or its atomic number. See below:

You can download this Chemistry App at

We even have a video on this for you here :



SOLVED: How to Connect a Ti89 Calculator to a modern Mac Computer using TI-Connect v4.1

Here is a proven way for those of you that struggle to connect your Ti89 calculator to a MAC computer.

This is what you need to do to get connected:

  1. Uninstall TI Connect v4.0 if installed.
  2. Download and Install TI Connect version 4.1  : . Beware: this link immediately downloads the .dmg file to your MAC, there is no webpage loading. Note: that download link may change if TI places the link on a webpage instead.
  3. Make sure that you do not have a USB cable connected to your computer WHILE installing TI Connect.
  4. If Ti89 is not recognized by your MAC: restart the MAC, try the other USB ports, have patience as drivers may take time to load. Listen carefully for sounds signaling successful driver installation.

Please find further information on troubleshooting connectivity issues here:

Dont forget TI’s contacts: 1800-TICARES  and – very friendly and helpful reps.


Simple Inverse Laplace Transforms using the TI-Nspire CAS CX

Simple Inverse Laplace Transforms using the TI-Nspire CAS CX can be done using the app “Differential Equations Made Easy” at

The images show that upon entering the Laplace Transform f(s) , the Inverse Laplace Transform is computed via its Integral Definition!

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Statistics Made Easy for the TiNspire update: Inverse Binomial Distribution Solver

We included two new features :

  • Inverse Binomial Distribution Solver: Find number of successes given cumulative probability, success probability and #trials.
  • Inverse Binomial Distribution Solver: Find number of trials given cumulative probability, success probability and #successes.

This update requires OS 4.4 or higher which can be downloaded here