var.test(x, y, ratio = 1, alternative = "two.sided", conf.level = 0.95)
x, y
| numeric vectors of data values. |
ratio
|
the hypothesized ratio of the population variances of
x and y .
|
alternative
|
indicates the alternative hypothesis and must be
one of "two.sided" , "greater" or "less" . You
can specify just the initial letter.
|
conf.level
| confidence level for the returned confidence interval. |
var.test
performs an F test of the null that the ratio of the
variances of the populations from which x
and y
were
drawn is equal to ratio
."htest"
containing the following components:
statistic
| the value of the F test statistic. |
parameter
| the degrees of the freedom of the F distribtion of the test statistic. |
p.value
| the p-value of the test. |
conf.int
| a confidence interval for the ratio of the population variances. |
estimate
|
the ratio of the sample variances of x and
y .
|
null.value
| the ratio of population variances under the null. |
alternative
| a character string describing the alternative hypothesis. |
method
|
the string "F test to compare two variances" .
|
data.name
| a character string giving the names of the data. |