Linear Regression for y on x - Least squares method using Sxy and Sxx | ExamSolutions

preview_player
Показать описание
The least squares regression for y on x is used to find the equation of the line of best fit for a set of bi-variate data by minimising the sum of squares of residuals as this video explains It uses the statistics Sxy, Sxx.

In this video you are shown how to work this out on a Casio Classwiz calculator using the statistics mode.

PREDICTIVE GRADES PLATFORM

☑️ Accurate grade predictions
☑️ Personalised resources and tuition
☑️ Guaranteed results or get your money back

SIGN UP FOR A 7-DAY FREE TRIAL, THEN 20% OFF.

ONLINE COURSES AT:

Рекомендации по теме
Комментарии
Автор

Play his videos on 1.5x or 2x speed if you feel he's going too slow. The explanations are well worth listening to.

MrOhWhatTheHeck
Автор

honestly, this is the best and only good explanation I've seen about the least squares

DaaaveYT
Автор

Best video on Linear Regression! Extremely helpful!
Thank you!

EricHamilton
Автор

Hello, sir. If I am not mistaken, a graphic calculator is allowed in the Math Studies exam on both papers... Why not use the calculator to calculate the line of regression instead of using and applying all those formulas?

danmandhk
Автор

@xImMorTalxT That was not the point behind the video. I was trying to explain from first principles. Anyway, what if you don't have a calculator that can do regression?

ExamSolutions_Maths
Автор

You Tube prevents me from placing a link here but if you go on my website check out the product moment coefficient in the statistics index or your exam module S1.

ExamSolutions_Maths
Автор

An x on y graph would be used when x depends on y. For instance if x were the temperature of a cup of coffee and y the time. Then the temperature of the coffee would depend on the time it is sitting around. For y on x, y depends on x.

ExamSolutions_Maths
Автор

All your videos has been great and explained in a simple manner. Thank you so much.

sansan
Автор

It will not necessarily be the exact value as it is a line of best fit. However, I would expect an answer fairly close to the real one. Have you checked your values and is your observed value x within the lower and upper values that were in the original data table.

ExamSolutions_Maths
Автор

It depends on the question. The best way is to look at the exam questions on my website and watch the videos for S1 June 2010 6e and S1 Jan 2008 4c. However, this would make for a good video which I may do.

ExamSolutions_Maths
Автор

@Exam Solutions
this was extremely helpful! Thank you for creating this video!

marymalu
Автор

fantastic, really. you explained my whole chapter just in 14 mins. i now don't need to study that heavy book which indeed sucks. you are wonderful.

imrankhan-zjli
Автор

@marymalu09 Pleased to hear that you found it useful

ExamSolutions_Maths
Автор

I really need more of this, this is very helpful

amadoujallow
Автор

Never mind, I found it. Great videos, you are a life saver!

IamGulzow
Автор

@Madsblach Yes but in place of your 'a' it will be my 'b' and in place of your 'b' it will be my 'a'.

ExamSolutions_Maths
Автор

Confused me in college, this helped a lot. Thanks!!

Botrous
Автор

Thank you very much!!! after reading book and watching this video, everything is clear!!! Even all those complicated equations ))

VarndTheGreat
Автор

love your videos you explain it so simply

RitoBardizard
Автор

i came back here to thank you , i passed the math exam because of you ..this is one of the only two type of exercise which ive done perfectly at the exam alll the others were half finished because i did not understand them very well, so it helped the overral grade a lot!lol..i wish you could do videos about random variables, probabilities, conditional probability, lagrange multiplier, integrals or second derivative test

natalieshinobi