1. Identify the level of significance.  2. Formulate the alternative hypothesis, Ha: p ≠ po.  3. Determine the critical value.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
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During the previous year, 55% of the people believed that there was an improvement in the country’s economy. This year, only 280 out of 500 randomly selected people believe that there is an improvement in the country’s economy. Using 0.05 level of significance, determine if this indicates a decrease in the number of people who believe that there is an improvement in the country’s economy.
1. Identify the level of significance. 
2. Formulate the alternative hypothesis, Ha: p ≠ po. 
3. Determine the critical value. 
4. Illustrate the rejection region in the normal curve.



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