Question

What's the formula for calculating a residual? Find the residuals for the players with 149 and 86 hits, respectively

Answer 1

@jim_thompson5910

Answer 2

http://stattrek.com/regression/residual-analysis.aspx

on that page they say

\[\LARGE e = y-\hat{y}\]

or in english

Residual = Observed value - Predicted value

Answer 3

so for x = 149, you got the predicted value of 85.329 roughly

but the actual observed value is 78. Look at the row that has 149 hits it corresponds to 78 runs

so...

\[\LARGE e = y-\hat{y}\]

\[\LARGE e = 78-85.329\]

\[\LARGE e = -7.329\]

Answer 4

the negative residual of e = -7.329 means that we made an overestimate

Answer 5

oh ok

Answer 6

do the same for x = 86

Answer 7

ok cool ty

Answer 8

residuals are the errors and the goal of any regression model is to minimize the errors (so minimize the residual values). The smaller the residuals, the better the fit

You can use a residual plot to see how well the model fits or not

Answer 9

ok thnxs,

Answer 10

np

Answer 11

can u help with another ?