Question: Finally, the marketing department selected 8 of the individuals for a special test concerning some proposed commercial advertisements for television viewing concerning new ratio designs. Originally they had all selected screen ratios of 1.621 or less. Then they were shown 5 different 30-second television commercials that emphasized images with designs that used screen ratios of 1.6:1 or greater. Following the viewing of the commercials they were then asked to select their preferred screen ratios again and their preferred screen ratios were recorded. The following is the data from this test.

With a confidence level of \(95 \%(\alpha=0.05)\) test to see if viewing the proposed television commercials made a difference in the preferred screen ratios of this sample of 8 potential consumers.

1. State the Null and Alternative Hypotheses.
2. Determine the critical value.
3. Determine the test statistic.
4. Interpret the results (decision and summary).

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