A study was conducted in which a sample of 20 adults was asked to rate the effectiveness of advertisements. Each adult rated a radio or television advertisement that lasted 30 or 60 seconds. The block design shows these ratings (on a scale of 1 to 5, with 5 being extremely effective).

Use technology and the block design to perform a two-way ANOVA test. Use α = 0.10. Interpret the results. Assume the samples are random and independent, the populations are normally distributed, and the population variances are equal.

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Advertising medium Radio Television 3, 5, 4, 1, 2 5 60 sec1,4,2,2,5 2,5,3, 4.4 30 sec 2,3,5, 1, 3