An NBC/Wall Street Journal poll asked adults monthly, "In general, do you approve or disapprove of the job Barack Obama is doing as president?" Suppose that the sample size in 2009, 2010, and 2011 was 2,000 adults.Use these results to test whether Presidential job approval ratings in these three years were independent of the survey date.Construct the hypotheses as follows: H₀: The approval rating (response) is independent of the survey date H_a: The approval rating (response) is not independent of the survey date At a 5% significance level, what is the critical value, $\chi$²_c, for the hypothesis test?

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The Answer of An NBC/Wall Street Journal poll asked adults monthly, "In general, do you approve or disapprove of the job Barack Obama is doing as president?" Suppose that the sample size in 2009, 2010, and 2011 was 2,000 adults.Use these results to test whether Presidential job approval ratings in these three years were independent of the survey date.Construct the hypotheses as follows: H₀: The approval rating (response) is independent of the survey date H_a: The approval rating (response) is not independent of the survey date At a 5% significance level, what is the critical value, $\chi$²_c, for the hypothesis test?

An NBC/Wall Street Journal Poll Asked Adults Monthly, "In General χ\chiχ

An NBC/Wall Street Journal Poll Asked Adults Monthly, "In General $\chi$