00:01
Hey there, welcome to numerate.
00:03
We have a sample of nine students over here where x is the hours per month playing video games and y is the first semester grade.
00:10
We have to construct a regression equation here.
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So the regression line equation would be written as y predictor equals bx where b is the slope plus a where a is a y intercept.
00:25
So to start with this equation, we're going to start with our means.
00:28
So x mean.
00:31
We're going to take the sum for the x, which is 201, divided by the sample size, which is nine students.
00:38
So divided by nine.
00:39
We're going to get a sample size, i mean of around 22 .3.
00:46
And for the y mean, we're going to sum up also and divided by nine.
00:51
So what we will have here is 521 divided by nine.
00:58
And this will equal 57 .9.
01:01
So what these two means now we can get the sum of squares of x.
01:07
Sum of squares of x is a sum of x minus the mean 22 .3 squared equals.
01:23
We should calculate a sum of squares of x of around 158...