mma.test | R Documentation |
Test for a monotonic trend in variances for normal samples. The test statistic
is based on a combination of the finite intersection approach and the classical
F
(variance ratio) test \insertCiteMudholkar_etal_1993lawstat.
By default, NA
s are omitted.
mma.test(y, group, tail = c("right", "left", "both"))
y |
a numeric vector of data values. |
group |
factor of the data. |
tail |
the default option is |
A list with the following components:
T |
the statistic and |
F |
the statistic and |
N |
the statistic and |
L |
the statistic and |
Each of the list elements is a list of class "htest"
with the following elements:
statistic |
the value of the test statistic. |
p.value |
the |
method |
type of test performed. |
data.name |
a character string giving the name of the data. |
Kimihiro Noguchi, Yulia R. Gel
neuhauser.hothorn.test
, levene.test
,
lnested.test
, ltrend.test
, robust.mmm.test
data(pot)
mma.test(pot[, "obs"], pot[, "type"], tail = "left")$N
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