Question: In a test of the quality of two television commercials, each commercial was shown in a separate test area six times over a one-week period. The following week a telephone survey was conducted to identify individuals who had seen the commercials. Those individuals were asked to state the primary message in the commercials. The following results were recorded.

1. Use \(\alpha=.05\) and test the hypothesis that there is no difference in the recall proportions for the two commercials.
2. Compute a \(95 \%\) confidence interval for the difference between the recall proportions for the two populations.

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