(50g) Working Multiple linear regression in English

[Gil]

Working my precious example,
you get after
{ 1 T.61 C.61 P.61 { DATA DODGE }
C.REG
the Matrixes RESUL(t):

[[ 'Y\->P.61' '\Gbi\[]\Ga\->5%' '\Gbi\166Values' 'T.TAB\->2.44691185114' 'S\Gb\|v' 'PROB\Gb\|v' 'VIF1\166With.Const1' 'VIF.WITH.CONST1\|v' 'CONDIT.IND\|v' ]
[ 1 'OK' -437.713632901 -7.55577881008 57.9309749403 2.78970456598E-4 '\175' '\175' '\175' ]
[ 'T.61' 'OK' .336530289395 3.75321467363 .089664545905 9.47384870108E-3 8.19773451775 '\GrXY\166?\->Not.Calc' '\GrXY\166?\->Not.Calc' ]
[ 'C.61?' '\Gb\->0' .410015695781 2.09038685644 .196143452834 .081554631945 8.19773451781 '\GrXY\166?\->Not.Calc' '\GrXY\166?\->Not.Calc' ]
[ '\175' '\175' '\175' '\175' '\175' '\175' '\175' '\175' '\175' ]
[ 'R2\->' '\175' .978404282436 'R2ADJ\->' .971205709914 'VARIAT.COEF\166%\166\->' 8.20725553662 '\175' '\175' ]]

We see that
the variable C61 has a question mark after its name (row 4, column 1).
It means that its beta coefficient is not significant.
It is confirmed in row 4, column 2, as there we read "beta—>0".
It's confirmed again in row 4, column 4, as there we read 2.09 for the t-value, when t-critical is greater and equal to 2.4469 (row 1, column 4).

What should be done?
Run the regression without the C61 variable.

In fact, in order to see what is happening, press the CHOIX (choice) at Page 2.1.

The result is
{ 1 T.61 C.61 P.61 { DATA DODGE } }.

Edit that list and delete the 3rd element, ie the variable C61.

The results is
{ 1 T.61 C.61 { DATA DODGE } }

Then run
C.RESTR?
(Page 2.2)

And you get the following Matrix:

[[ 'F.RESTR.TAB' ]
[ 5.98737760727 ]
[ '\[]>\[]' ]
[ 'F.RESTR' ]
[ 4.36971720886 ]
[ 'PROB.RESTR\166H0' ]
[ 8.15546319643E-2 ]
[ '\->H0\166Accepted' ]]

And you accept this Ho Hypothesis,
not using the C61 variable, as 5.987 > 4.3697.