Let 
. Compute the differential dz.
Definitions:
Null Hypothesis
A hypothesis that suggests there is no statistical significance in the given set of observations, often denoted as H0 and used as a default hypothesis to be tested.
Significance Level
A threshold chosen by the researcher which denotes the probability of rejecting the null hypothesis when it is actually true, often denoted as alpha.
SRS
A simple random sample, which is a subset of a statistical population in which each member of the subset has an equal probability of being chosen.
Significance Test
A statistical procedure for testing a hypothesis to determine if there is enough evidence to reject the null hypothesis.
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