H1: The average household income in zip code 71227 is greater than $50,000.
H1: The average household income in zip code 71227 is greater than $50,000.
Answer :
This is univariate or one sample hypothesis test , here variable : income ,
one sample hypothesis tests comparing some observed sample mean against a benchmark value . the test addresses the question , is the sample mean truly different from the benchmark ? the level of scale
measurement is ratio scaled . and if the sample size is large . parametric statistical procedures are appropriate
in this case a one sample t test is appropriate for testing this hypothesis because in involves an observed
mean income against the value of $ 50000
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