Last Updated
：2025/11/21
null hypothesis
Noun
(statistics)
A
hypothesis
set
up
to
be
nullified
or
refuted
in
order
to
support
an
alternative
hypothesis.
When
used,
the
null
hypothesis
is
presumed
true
until
statistical
evidence
in
the
form
of
a
hypothesis
test
indicates
otherwise.
Therefore,
the
null
and
the
alternative
hypothesis
must
be
mutually
exclusive
and
exhaustive.
Japanese Meaning
統計学において、帰無仮説とは、反証（帰無）を目指して設定される仮説であり、仮説検定において統計的証拠が示されるまでは真であると仮定される。対立仮説と互いに排反的であり、両者で全ての可能性を網羅する必要がある。
Sense（1）
(statistics)
A
hypothesis
set
up
to
be
nullified
or
refuted
in
order
to
support
an
alternative
hypothesis.
When
used,
the
null
hypothesis
is
presumed
true
until
statistical
evidence
in
the
form
of
a
hypothesis
test
indicates
otherwise.
Therefore,
the
null
and
the
alternative
hypothesis
must
be
mutually
exclusive
and
exhaustive.
（ plural ）
Quizzes for review
(statistics) A hypothesis set up to be nullified or refuted in order to support an alternative hypothesis. When used, the null hypothesis is presumed true until statistical evidence in the form of a hypothesis test indicates otherwise. Therefore, the null and the alternative hypothesis must be mutually exclusive and exhaustive.
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See correct answer
null hypothesis
Before conducting the experiment, the researchers stated the null hypothesis that the new drug has no effect, and they designed the trial to test it rigorously.
See correct answer
Before conducting the experiment, the researchers stated the null hypothesis that the new drug has no effect, and they designed the trial to test it rigorously.
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