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Content » Hypothesis Testing of Single Mean and Single
Proportion: Distribution Needed for Hypothesis Testing
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(What is a tag?)      Earlier in the course, we discussed
sampling distributions. Particular distributions are associated
with hypothesis testing. Perform tests of a population mean
using a normal distribution or a student-t distribution.
(Remember, use a student-t distribution when the population
standard deviation is unknown and the population from which the
sample is taken is normal.) In this chapter we perform tests of
a population proportion using a normal distribution (usually nn
is large or the sample size is large).  If you are testing a
single population mean, the distribution for the test is for
averages:  X¯ X ~ N ( μ X , σ X n ) N( μ X , σ X n ) or t df t
df  The population parameter is μμ. The estimated value (point
estimate) for μμ is x¯x, the sample mean.  If yo