<PRE><B>Question 1120130</B>
Hypothesis statements are always about parameters, not samples
Ho: mu=$71.84
Ha: mu NE $71.84

The point estimate is the sample mean or $80.240
90% CI has interval t (df=179, 0.95)s/sqrt (n)
-1.649*22.6/sqrt(180) is interval width or 2.778
The interval is ($77.462, $83.018)
Since $71.84 is not in the interval, we reject Ho and conclude the average price is not $71.84
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