CAL 1950 1 1
All 5 1991:01
Open data c:\1232\1232.wk1
data(format=wks,org=obs) / year sales invent

****Part A solution****

Linreg invent / resid1
# constant sales

****Part E solution****
****After knowing the p value****

set yhat = invent - ( 0.312981 * invent{1} )
set xhat = sales - ( 0.312981 * invent{1} )

Linreg yhat / resid2
# constant xhat

****Part G solution****

log invent / lny
log sales / lnx

Linreg lny / resid3
# constant lnx

****After knowing the p value****

set lnyhat = lny - ( 0.400089 * lny{1} )
set lnxhat = lnx - ( 0.400089 * lnx{1} )

Linreg lnyhat / resid4
# constant lnxhat

End

And then click here for the results