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Question 1 Both before and after a recent earthquake, surveys were conducted asking voters which of...

Question 1

Both before and after a recent earthquake, surveys were conducted asking voters which of the three candidates they planned on voting for in the upcoming city council election. Has there been a change since the earthquake? Use a level of significance of 0.05. Table shows the results of the survey. Has there been a change in the distribution of voter preferences since the earthquake?

Peter Alan Sui
Before 1838 418 1475
After 1420 329 1140


What is the chi-square test-statistic for this data?
χ2=χ2=


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Answer #1

The contingency table below provides the following information: the observed cell totals, (the expected cell totals) and [the chi-square statistic for each cell].

Answer is 0.0555

Results Sul Peter 1838 (1836.19) [0.00] 418 (421.01) [0.02] 1475 (1473.80) [0.00] 1420 (1421.81) [0.00] |329 (325.99) [0.03] 1140 (1141.20) [0.00] Alan before after Row Totals 3731 2889 Column Totals 3258 747 2615 6620 (Grand Total)

The chi-square statistic is 0.0555.

The p-value is .972643.

The result is not significant at p < .05.

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