Chi-Square Goodness of Fit Program for TI-83 or TI-84

Some TI-83s and TI-84s have a preprogrammed Chi-Square Goodness of Fit (GoF) test, but most do not. This video shows you how to program your calculator to do the GoF test for you - taking you through the details of writing the program and then showing you how to use the program with a data set example.

Category:

Education

Tags:

• chi
• chi-square
• chi-squared
• Goodness of Fit
• GoF
• hypothesis test
• bivariate data
• statistics

[hellokittyalvarez]

I need a sample problem to do my stats homework tonight! :( do you have a video with a sample problem???? PLEASE!

[EllenSmyth]

@hellokittyalvarez The end of this video has a sample problem. There are also other sample problems in other Chi-Square Goodness (GoF) videos, which you can go to by clicking on the video you want along the left side of the page.

[tvu86]

Hi Ellen - how would I determine the test statistic from the data we see on the calculator. Thanks very much if you can respond soon!

[EllenSmyth]

@tvu86 The test statistic for this, the Chi-Square Test, is the Chi-Square value. With the example data I used, the test statistic was 27.5, but of course that will vary greatly with what data you have.

[koontzrob22]

This looks to be a great program but every time i try to use it it says Err: Dim mismatch if you could help me out it would be greatly appreciated

[EllenSmyth]

@koontzrob22 Go to your lists (under STAT > Edit) and make sure that L1 and L2 are the same length (same number of data values) before running the program. Dim mismatch means that the dimensions of your data aren't matching up with what you want to do, and the length of the lists is often the cause. I hope this helps. If not, it could be something wrong off the program itself. Syntax is a fickle beast.

[ttiiyy]

Thank you so much for posting this video! God bless you!

[1Arista1]

Ellen, add my comment to the already long list of thank you's. A great video! I must confess I used the pause button a lot to follow your instructions, but it was WELL WORTH IT. Keep the videos coming! These videos are what it's all about! Thank you again.

[invisibleana]

Thank you so much Ellen! My older calculator without this program meant that my classmates with newer calcs were able to do all this in a quarter the time I took. But no longer! Best-spent 8:44 of my life.

[devotchka1024]

thank you Ellen! :)

[JoMello13]

GREAT VIDEO!! YOU ROCK!!

[karaleapful]

I just have to say..you are AWESOME!! I am on my final chapter of an online course (that has pretty much been self-taught because the teacher doesn't really answer questions). I just found your video and wish I would've found you sooner for help on other elementary stats stuff!! You are the teacher I didn't get with my course! Thank you soooo much!!!

[tvu86]

@EllenSmyth Thank you so much. I'm having a difficult time grasping the subject and your help surely made it easier.