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Author Question: Before the presidential debates, it was expected that the percentages of registered voters in favor ... (Read 18 times)

kled

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on: Mar 25, 2023

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.

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by kled on Mar 25, 2023

mgranuc

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Reply #1 on: Mar 25, 2023
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kled

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Reply 2 on: Mar 25, 2023
Gracias!

vickyvicksss

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Reply 3 on: Yesterday
Wow, this really help

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