00:01
Let us start with our solution.
00:01
So, we are given that summation of x is equal to 276, summation of x square is equal to 6888, summation of y is equal to 193, summation of y square is equal to 3421, then summation of x y is equal to 4842 and n is equal to 12.
00:29
This all has been given to us and we know that least square regression line of y on x is given by y cap is equal to a plus b into x.
00:42
Over here what we have to find is we need to find the value of a and b.
00:47
So, the value of a that is a is given by a is equal to summation of y into summation of x square minus summation of x into summation of x y divided by n summation of x whole square minus summation of to the whole square.
01:13
So, simply we will substitute all the values in this and find our value of a that is a is equal to 193 multiply by 6888 minus 276 multiply by 4842 divided by 12 multiply by 6888 minus 276 whole square.
01:44
What we will be doing is we will be solving this.
01:47
So, after solving it we have got 7 minus 7008 divided by 6480 that is minus 1 .08.
02:00
We have corrected to two decimal place.
02:03
Now, similarly we will be finding our value for b...