The significance level to be used in a hypothesis test will usually be
given.
Tests for the difference between
the means of two normal
distributions with unknown
variances.
Independent and paired samples. For independent samples, only
when the population variances may be assumed equal so that a pooled
estimate of variance may be calculated.
Small samples only. Using a
t -statistic.
Tests for a normal population
variance (or standard deviation)
based on a random sample.
Using a
2
-statistic.
Tests for the ratio of two normal
population variances (or
standard deviations) based on
independent random samples.
The significance level to be used in a hypothesis test will usually be given.
Tests for the difference between the means of two normal distributions with unknown variances.
Independent and paired samples. For independent samples, only when the population variances may be assumed equal so that a pooled estimate of variance may be calculated.
Small samples only. Using a t -statistic.
Tests for a normal population variance (or standard deviation) based on a random sample. Using a 2 -statistic.
Tests for the ratio of two normal population variances (or standard deviations) based on independent random samples.