1. Before the last presidential debates, 50% of registered votes indicated that they planned to vote for the incumbent president. In a recent survey of 1,200 registered voters after the debates, 636 indicated they plan to vote for the incumbent president. Has there been a significant increase in the share of registered voters who plan to vote for the incumbent president?

a.	State the null and alternative hypotheses to be tested. List type I and type II error.
b.	Calculate the test statistic.
C.	The null hypothesis will be tested using α = .05. Determine the critical values for this test.
d.	Calculate the p value . What do you conclude about an increase in registered voters?

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The detailed answer for the above question is provided below Hypothesis Testing for Shift in Voter Preference a Null and Alternative Hypotheses Null H... View the full answer