Perform a Z-test of the null hypothesis mean (x) == m
for a sample x from a normal distribution with unknown mean and known
variance v.
Under the null, the test statistic z follows a standard normal distribution.
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
mean (x) != m. If alt is ">", the
one-sided alternative mean (x) > m is considered.
Similarly for "<", the one-sided alternative
mean (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 along with some information.
Package: statistics