For a sample x from a normal distribution with unknown mean and variance, perform a t-test of the null hypothesis
mean (
x) ==
m. Under the null, the test statistic t follows a Student distribution with df= length (
x) - 1
degrees of freedom.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 alternativemean (
x) !=
m. If alt is">"
, the one-sided alternativemean (
x) >
m is considered. Similarly for "<", the one-sided alternativemean (
x) <
m is considered. 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.