Perform an t test for the null hypothesis rr
*
b=
r in a classical normal regression model y=
x*
b+
e. Under the null, the test statistic t follows a t distribution with df degrees of freedom.If r is omitted, a value of 0 is assumed.
With the optional argument string alt, the alternative of interest can be selected. If alt is
"!="
or"<>"
, the null is tested against the two-sided alternative rr*
b!=
r. If alt is">"
, the one-sided alternative rr*
b>
r is used. Similarly for "<", the one-sided alternative rr*
b<
r is used. The default is the two-sided case.The p-value of the test is returned in pval.
If no output argument is given, the p-value of the test is displayed.