Question

Stats help please?

Answer 1

@rational

Answer 2

Residual = Observed value - Predicted value
e = y - ŷ

Answer 3

I think you can use the linear regression capability of your calculator

Answer 4

When i plug this into my calculator, the regression line is
ŷ = 26.2107 -.249632*x

Answer 5

now subtract the predicted from the actual y value

Answer 6

Oh ok thanks, so do i plug in 73 for x and do 26.2107-18.223136=7.987564?

Answer 7

first find y hat @x =73, so you have to plug in 73 into the formula. then subtract from the observed y value at x = 73, which is 7.9

y - ŷ = 7.9 - [26.2107 -.249632*(73) ]

Answer 8

ohhh ok so i got -.087564

Answer 9

oh what i did was [26.2107 -.249632*(73) ] first which gave me 7.987564 and then subtracted that from 7.9 and i got a negative number

Answer 10

Residual = Observed value - Predicted value
e = y - ŷ

Answer 11

oh so it should be positive and 7.987564-7.9 instead?

Answer 12

nevermind youre right

Answer 13

it should be -.0876

Answer 14

☺

Answer 15

ok thanks!!

Answer 16

theres a mistake in the excel

Answer 17

corrected

Answer 18

awesome :) thanks!