STA3032 QUIZ 5 Solutions

STA3032 QUIZ 5 Solutions - Satisfied iii Large Sample...

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Name (IN CAPITALS): UFID STA 3032 Engineering Statistics Quiz 5 Spring 2011 Problem 10.30 [page 522] A YSW poll reported on November 30, 1984, showed that 54% of 2207 people surveyed thought the US income tax system was too complicated. Can we conclude safely, at the 5% significance level that the majority of Americans think the income tax system is too complicated. [IN YOUR ANSWER SHOW ALL STEPS IN DETAIL.] A) Assumptions i) SRS Satisfied ii) Categorical Variable
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Unformatted text preview: Satisfied iii) Large Sample Satisfied iv)π = Proportion of all Americans who think the income tax system is complicated B) Hypotheses Ho: π ≤ 0.5 vs. Ha: π > o.5 C) Test Statistic D) The p-value E) Decision Reject Ho since p-value < any reasonable α. F) Conclusion The observed data give strong support to the conjecture that the majority of Americans think the income tax system is too complicated....
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