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bigben0007 bigben0007
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A year ago

Before the presidential debates, it was expected that the percentages of registered voters in favor of various candidates would be as follows.

 

Percentages

Democrats

48%

Republicans

38%

Independent

4%

Undecided

10%


After the presidential debates, a random sample of 1200 voters showed that 540 favored the Democratic candidate; 480 were in favor of the Republican candidate; 40 were in favor of the Independent candidate, and 140 were undecided. We want to see if the proportion of voters has changed.

a.Compute the test statistic.
b.Use the p-value approach to test the hypotheses. Let α = .05.
c.Using the critical value approach, test the hypotheses. Let α = .05.

Textbook 
Essentials of Statistics for Business and Economics

Essentials of Statistics for Business and Economics


Edition: 7th
Authors:
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LaceyCGibsonLaceyCGibson
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A year ago
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bigben0007 Author
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A year ago
Helped a lot
klyn
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Yesterday
this is exactly what I needed
jmendoza
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2 hours ago
Brilliant ツ
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