Confidence intervals 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
distribution.
Confidence intervals for a
normal population variance (or
standard deviation) based on a
random sample.
Using a
2
distribution.
Confidence intervals for the
ratio of two normal population
variances (or standard
deviations) based on
independent random samples.
Introduction to
F
distribution. To include use of the supplied tables.
Using an
F
distribution.
Confidence intervals 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 distribution.
Confidence intervals for a normal population variance (or standard deviation) based on a random sample. Using a 2 distribution.
Confidence intervals for the ratio of two normal population variances (or standard deviations) based on independent random samples.
Introduction to F distribution. To include use of the supplied tables. Using an F distribution.