00:01
Hey there, welcome to numerate.
00:03
So we're given the average life expectancy of a person here, and we're asked to find the equation for the regression line.
00:09
So the format of the equation would be y predictor equals bx.
00:15
So b is our slope.
00:17
It's just the round slope and intercept with a to one decimal place.
00:22
So to start off with, for this, we're going to find our mean.
00:28
So for our mean, we're going to have our x.
00:31
Which is their year and why is our life expectancy so we have x mean equals to the sum so if we sum of all the values we should get around 28 ,105 divided by our sample size so our sample size here is let's see we got a sample size of looks like it's 14 so we're going to divide by 14 and we get an x mean of around 2 .000 2007 .5.
01:14
And for the y mean, we're going to do the same equation here.
01:17
So we get a sum of y -917 .9 divided by 14.
01:29
Equals, we get a y mean of 65 .6 rounded.
01:35
And now we can find our sum of squares...