TI83/84: DIY Inverse chi-square program

[@maxedoutvibes]

For some reason this wasn't an included lesson in my stats class, very glad I was able to find it here.

[@brandonmancilla3402]

As much as I shouldn't, I absolutely despise looking at the table for the value I need. I really appreciate the video! Thank you!

[@KevinPalmer-p9u]

Your voice was very relaxing, 10/10 would recommend to a friend

[@raiddear8063]

Thank you so much !!! You explained it so easily !!

[@Poke_Leaf]

Thank you so much for this! Needed this function for a stats course!

[@quantquill]

Glad it helped!

[@Mothballzz]

thank you ! It worked on my physical calculator ti-84 plus, so it doesn't just work for computer software

[@K4RM0_SENSEI]

thank you so much !!!

[@scottcampbell7596]

This helps me so much. Thank you!!

[@stm3265]

This is so helpful thank you!

[@AerstalRiley]

Vielen Dank

[@saulblackfire]

You save me! Thanks!

[@joseboy1993]

I love you! lol thanks so much!

[@GabbiBelleS]

pretty awesome! thanks for sharing.

[@tagumanicholas6572]

'I followed the steps and when I hit enter after putting the df I get "Err:Syntax 1: Quit 2:Goto

[@quantquill]

Hi Taguma, if you have a Ti 83 or TI 84 that looks like the calculator simulator, then we know the program works. So you should double check your code is set up correctly -- every space, comma and period matters. If you have any other calculator, like a TI 84 CE, then the code or the steps may be a little different. This program only applies to this specific calculator.

[@jakemamula8067]

dope as hell

[@ElektraBoom]

THANK YOU!!!

[@jimiwild564]

Thank you!

[@quantquill]

You're welcome!

[@chizhang3263]

thanks very helpful

[@tonyt.641]

can you run this for the left side as well or no?

[@quantquill]

Yes, if you put the area to the right of your left-tailed X2 value. In the example in the video, I got a right-tailed X2 by indicating it had 5% (0.05) of area to the right. If you want the X2 that has 5% of area to the left, then it will have 95% of area to the right, so you'd put 0.95 in as "Area Right". Hope that helps!

[@tonyt.641]

@@quantquill thank you!

[@rosienazario3254]

Is there a way to do Area Left?

[@quantquill]

Hi Rosie, since 100% of area is under the curve, the chi square critical value with (for example) 5% of area to the left is the same as the one with 95% of area to the right. So if you are asked for a left tailed chi square, you can run the program and put "1 - area to the left" in your Area Right field. Hope that helps!

[@Mayzaf14]

Thank you so much!

[@maxpercer7119]

pretty slow program, but useful

[@quantquill]

Hi, Max, thanks for the comment. If you find a way to speed it up, I'm all ears! It seems to be an inbuilt feature of the calculator that it takes a while to crunch through the computations.