Perform a 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.
Package: statistics