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is the alternative hypothesis, which is the opposite of the null hypothesis.
Statistical inference allows us to either accept or reject the null hypothesis.
Based on the observed value, how possible the statistic is beyond this value
under the null hypothesis (also called the p-value) is determined. Following
statistical logic, when the possibility is fairly large (usually more than 0.05),
the null hypothesis is not rejected. However, when the possibility is very small
(usually less than 0.05), this event does not seem to occur under the null
hypothesis, and the conclusion is that the null hypothesis is wrong, and the
alternative hypothesis is accepted.
Under the normal assumption, two standard devia ...