Multiple-sample tests for equal variances

`vartestn(`

returns
a summary table of statistics and a box plot for a Bartlett test of
the null hypothesis that the columns of data vector `x`

)`x`

come
from normal distributions with the same variance. The alternative
hypothesis is that not all columns of data have the same variance.

`vartestn(`

returns
a summary table of statistics and a box plot for a test of unequal
variances with additional options specified by one or more name-value
pair arguments. For example, you can specify a different type of hypothesis
test or change the display settings for the test results.`x`

,`Name,Value`

)

`vartestn(`

returns
a summary table of statistics and a box plot for a test of unequal
variances with additional options specified by one or more name-value
pair arguments. For example, you can specify a different type of hypothesis
test or change the display settings for the test results.`x`

,`group`

,`Name,Value`

)