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Before the last presidential debates, 50% of registered votes indicated they were planning to vote for the incumbent president. In a recent poll of 1200 registered voters after the debates, 636 indicated they are planning to vote for the incumbent president. The research question is - Has there been a significant increase in the proportion of registered voters who are planning to vote for the incumbent president (level of significance .02)?     What is the z critical value?

Before the last presidential debates, 50% of registered votes indicated they were planning to vote for the incumbent president. In a recent poll of 1200 registered voters after the debates, 636 indicated they are planning to vote for the incumbent president. The research question is - Has there been a significant increase in the proportion of registered voters who are planning to vote for the incumbent president (level of significance .02)?     What is the z critical value?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Before the last presidential debates, 50% of registered votes indicated they were planning to vote for the incumbent president. In a recent poll of 1200 registered voters after the debates, 636 indicated they are planning to vote for the incumbent president. The research question is - Has there been a significant increase in the proportion of registered voters who are planning to vote for the incumbent president (level of significance .02)?
 
 
What is the z critical value?

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