00:01
So in this one we want the correlation coefficients, which is this formula, where we have the sample standard deviation for x and y in the denominator, that product, and the covariance in the numerator, which is the sum of x minus x times x times y, bha bar, divided by n minus 1, all divided by s sub as s of y.
00:37
So if we said x was speed and we made a table, 30, 50, 40, 55, so on.
01:21
And y was fuel autonomy.
01:47
Well, if we found x bar, that's adding up the speed, dividing by 10, we get 42.
01:54
Y bar adding up the fuel dividing by 10 we get 27 and n minus 1 is 9 so if we take x minus x bar 30 minus 42 is negative 12 y minus y bar 28 minus 27 is 1 and the product would be negative 12 and we repeated that for each one 8 and negative 2 respectively 16, negative 2, negative 2, 4, 13, negative 4, negative 52, negative 12, 3, negative 36, negative 17, 5, negative 85.
03:05
So i'm just following that same pattern, and filling out my table.
03:16
Negative 17, 8, negative 136, 8, negative 1, negative 8, 12, negative 2, negative, 13, 13, negative 2 is negative 26...