00:01
Let's solve the given equations according to the question.
00:04
In part a, n is equal to 14, summation of x is equals to 57 .15.
00:17
Summation of y is equals to 1150.
00:21
Summation of x squared is equals to 236 .47.
00:26
Summation of x whole square is equal to 3266 .12 submission of x y is equals to 4 637 .7 so b is equal to n submission of x minus submission of x submission of 5 divided by n submission of x squared where submission of x whole square is equal to minus 17 .87 a is equal to summation of y minus b, summation of x divided by n greater equals to 1 .55.
01:06
So therefore, y is equal to 1 55 .09 plus minus 1 .17 .87 x.
01:18
So now, r is equal to n, summation of x 5.
01:24
Minus summation of x summation of pi divided by under root n summation of x squared minus summation of x whole squared under root n summation of pi squared minus summation of y squared so it is equals minus 0 .8 .05 so therefore r squared is equal to 0 5 and 6 4 a 7 1 now, moving to part b of this question.
02:00
Then, according to the part b, n is equal to 14, summation of x is equals to 10088, summation of 5 is equals to 1150, summation of x squared is equals to 73031110, summission of x, whole square is equals to 10176 -7744.
02:26
Summission of xy is equals to 83 -855.
02:31
From the previous formulas we get b is equal to 0 .2, a is equals to minus 4 .33.
02:39
So therefore, y is equals to minus 4 .33 plus 0 .12x.
02:47
So, r is equals to 0 .576, then r squared is equal to 0 .33175.
02:59
Now, moving to part c of the question, then in the part c, n is equal to 14, summation of x is equal to 3 .575, summation of y is equal to 115.
03:17
Summation of x, 5 is equal to 0 .92.
03:20
Summission of x, whole square is equal to 12 .78.
03:25
Summission of xy is equals to 293.
03:29
8 .3 .5.
03:32
So therefore, a is equals to 62 .25...