how to do chi square on ti 84 This is a topic that many people are looking for. passionistsisters.org is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, passionistsisters.org would like to introduce to you Using a TI-84 For Finding A Chi-Square Test Statistic. Following along are instructions in the video below:
How do you run a chi square test in the calculator so this is for for whenever youre doing independence or or homogeneity. We arent going to do homogeneity test. But its the same test so thats its just your interpretation.
So itll get these this data. Thats got two categories on to two categories for the columns in two categories for the row. So its a two way table and the way you run get the chi square test statistic for this on your calculator.
Youre gonna do second x to the negative one you see that button there. And it has the blue matrix above it then we want to edit our matrix.
So i want to get the edit highlighted so that you can either hit the right arrow. Twice or if youre here at this screen you can select arrow wants to jump there if you want to edit on edit matrix a and this is a two rows and two columns then you type your numbers in 24 lc 2442 26. And 41 and make sure you get them typed in correctly.
Its the number one error i make so im gonna quit so second quit and now youre gonna do staff tests remember we either hit the right arrow twice or the left arrow wants to get over there then chi square is the bottom of the list. So i can click the up arrow to get way down on the bottom. And you see theres the goodness of fit test.
When you have a one way table you know in just one category and or one little one variable in a bunch of categories and then were looking for a chi square test. So choice c and thats looking its asking you when do you put.
Where did you put your um your data well we put the what we saw we observed in matrix a itll calculate matrix the expected for so we dont have to do that you can run calculator and lo and behold theres chi square. Theres the p value. Its huge of course.
And there and asking us this. So theres your chi square. Number.
That you go there okay otherwise you do this by hand. You have to subtract each of these values um square m.
Square. The difference divided by this expected number. And do that for all four pairs of numbers find the sum of those um.
One thing i wanted to show you for a little top this video is thats observed as these expected values remember how we had it the calculator dump it into matrix b. If i access. The matrix list for matrix b notice.
Im not adding it this time. I just i wanted to know whats in matrix b.
So im just gonna select. It and enter it and then im getting some values and theres the 248. One that you calculated in the twenty five point eight.
One now one thing you doing you calculated it so you can see all the decimal places well you can scroll over and do it that way you can also do mode. Then fix the number of decimal places to i dont know what is ma. But math looking for two or three im gonna fix it it twos and thats what im seeing on that table and quit.
And im just gonna do second answer again just so i dont have to reiax s. All those and theres our two decimal places. And you can see everything so chi square over the calculator is very easy youre just going to input the original table it wont give you all the information that you need for that well itll give you most of it so i hope that helps you do this this good technology.
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