That's ordinary least squares, is the approach we'll take at first.

later on in this course. Understand what ordinary lease squares estimation does.

We're still doing ordinary least squares regression just like we did in simple regression but now we'll be using matrix algebra to calculate the coefficients.

Squares

Squares

Completed Squares

Ordinary.

Ordinary.

Ordinary, repressed.

Exceptionally ordinary

Remember the notation, the sum of squares and mean squares.

Five squares, subtract four squares equals one square, one twentieth.

Okay, so sum of squares, mean squares, that gives us variance.

Draws rectangles and squares

Look at my squares.

32 pieces, 64 squares.

Ordinary for me.

The ordinary kind.

17 red and orange squares are juxtaposed with just two green squares.

Sums of the squares for the mo del and sums of squares residual.

What's in the denominator? Sums of squares X, and sums of squares Y.

I want to talk about something really ordinary. Just ordinary sand.

I want to talk about something really ordinary, just ordinary sand.

So sum of squares X, sum of squares Y, and then some squares, sorry, some of cross products for X and Y.

Concentric squares of alterating height

Who said squares are flat?

Paint empty squares or erase

It's a difference of squares.

Let me draw two squares.

These aren't ordinary strawberries.

There are ordinary heroes.

Perfectly ordinary scientific paper.

It's no ordinary wound!

They're not ordinary hunters.

Ordinary Wizarding Level examinations.

Those are ordinary cephalopods.

So all squares are rhombuses, but not all rhombuses are squares. Now, with that said,

So variants you remember is mean squares. It's the sum of squares divided by N.

Connect the dots to create squares

Connect the dots to create squares

Erase objects or paint empty squares

So it has 100 squares here.

That's the residual sums of squares.

Returns this matrices called magic squares.

She didn't paint all those squares.