Regression Lines and Correlation with TI-84

I make a scatterplot, calculate the Least Squares Regression Line, find correlation, and then make a Residual Plot to verify the linearity of the scatter plot.

[gabielle]

I was seriously considering dropping out of stats, then i found your videos... Ahhhh it is so nice to have study videos that are easy to understand.

[profrobbob]

@MenWhoStareAtLlamas I am freaking thrilled you liked it so much!!! Thanks:)

[profrobbob]

You are welcome...and thank you for showing your support and subscribing! My channel growth happens through the support of my viewers...please spread the word:D...thanks.

[profrobbob]

:) I am glad I could help. I hope you do great in your class.

[profrobbob]

After make a regression line the calculator stores all the residuals in a list. Go to the List Menu, find the RESID list and store those values in an empty list...like L3 or L4. You can then square all the residuals...add them up...and there is your sum of the squared residuals.

[profrobbob]

I happy to hear that my videos are such a time saver for you! I hope you will share my channel with your friends if you feel it would benefit them as well:D...thanks for watching:)

[AronKishore]

You sir have saved my life

you're the best, subscribed.
I'll tell my other AP stats class mates about you omg

[profrobbob]

Yes, they have updated the software and I looks different now. You need to go somewhere and turn off the wizard...or just put L1 for the xlist, L2 for the y list, 1 for frequency, and y1 for the regression EQ.

[ReaganTechVideos]

Hi! I usually don't comment, but I just wanted to take a moment to thank you for all of the videos! Your videos have helped me on several AP Stats unit tests this year, and because of your videos, I got the highest score on my first quarterly. I have my midterm tomorrow, and I'll be watching every video and thumbing them all up. Go Mr. Tarrou!!!

[profrobbob]

:):):) Thank you very much for watching! Please support my efforts by spreading the word. I hope you continue to find more of my videos helpful and you do great in your class.

[profrobbob]

If I am reading your numbers correctly...I made a scatter plot and then a residual plot and I would say that a regression line is a good model for this data.

[MalloryNash]

Thank you so much for making these videos!! Helps more than you realize!!!

[profrobbob]

If you type in the type of calculator and what you want to do you can probably find any thing on YouTube and the official TI site has plenty of videos as well.

[profrobbob]

Put each x in four times in L1 and then the corresponding y values in L2. L1:1, 1, 1, 1, 5, 5, 5, 5... L2:21, 19, 25, 27, 38, 38, 45, 41... Then make the scatterplot and regression line. Does that make sense?

[airplane]

Thank you soo much, its right before the AP test and my r and r^2 wasnt appearing. You have saved me, the reason it disappeared was because my friend stole one of my batteries and wiped out all my programs and stuff....

[spicyasianchic]

thank you so much - I've been trying to figure that out since i started the semester! Wish i had found your videos earlier, thanks again!

[profrobbob]

Looks like I need to update my software and make another video. Thanks coach:D

[VinnyGuana]

i love you. you just saved my life.

[profrobbob]

The full name is the Least Squares Regression Line because you want to minimize the total area of the squared residuals. If you don't square the residuals the sum would always be zero. Are you the reason I got about ten subscribers within an hour or was that a coincident. I appreciate you telling your friends about my videos. I can't thank you enough\:D/ I hope you do great in your class and pass the AP test!

[profrobbob]

@224singh You are very welcome. Thank you for Subbing:)