Question about Texas Instruments TI-84 Plus Calculator

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There are several applications missing on my ti-84. I don't have tcdf, chi squared cdf, or chi squared GOF test. How can I get these on my calculator?

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Those functions are in the DISTR menu, accessible by pressing 2ND [DISTR].

If you need any of them, you can download apps from
http://education.ti.com/educationportal/sites/US/productDetail/us_ti84p.html?bid=7

Posted on Apr 07, 2011

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I want to do a chi-square test on the TI-85


The chi-square test is used for a lot more than just contingency tables.

I found one program for the TI-86 (which is basically the same machine as the TI-85, only with more memory) which claims to do the chi-square goodness of fit test.

You might also want to browse through this archive.

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I encountered this same problem with the TI-84. Turns out you have to put your P (Percentage) as out of one hundred. For example. With my problem I had;

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The TI-84 does not have a built-in quintic fit.

The most common scheme for fitting a model to data is the least squares. You'll find several programs to calculate this here.

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1 Answer

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I remember this happening once to my TI-83. I know it's a different calculator. But it happened frequently. Without completely reconfiguring the calculator, you can remove the batteries whenever you see the message and when you start it up again, it should be okay. It may continue to display this message once in a while. I used to just remove the batteries. I don't know if it will work on your TI-84 the way it worked on my TI-83, but I hope this helped!
Please rate my solution!
- Frankie

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I have a TI-83 and there has been a dark spot on my screen for several years and it has not been a problem. Try to use yours for as long as possible unless the screen is unviewable.

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1 Answer

I don't have a chi square goodness of fit test, where can i find?


You can find the chi-square test for two-way tables and the chi-square goodness of fit tests in the STAT TEST menu (STAT Left).

You can find the chi-square probability density function in the DISTR menu (2ND [DISTR])

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