The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean

Question

The manufacturer of a refrigerator system for
beer kegs produces refrigerators that are
supposed to maintain a true mean temperature, μ,
of 41F, ideal for a certain type of German pilsner.
The owner of the brewery does not agree with
the refrigerator manufacturer, and claims he can
prove that the true mean temperature is incorrect.
Assuming that a hypothesis test of the claim has
been conducted and that the conclusion is to
reject the null hypothesis, state the conclusion in
nontechnical terms.
There is not sufficient evidence to support the claim
that the mean temperature is different from 41°F.
There is sufficient evidence to support the claim
that the mean temperature is different from 41°F.
There is sufficient evidence to support the claim
that the mean temperature is equal to 41°F.
There is not sufficient evidence to support the claim
that the mean temperature is equal to 41°F.

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