Statistical test

After receiving complaints from readers, your campus newspaper decides to redesign its front page. Two new formats, B and C, are developed and tested against the current format, A. A total of 75 students are randomly selected, and 25 students are randomly assigned to each of three format conditions. The students are asked to evaluate the effectiveness of the format on an 11-point scale (1= poor, 11 = excellent).

a. State the null hypothesis.

b. What statistical test should you use?

c. What are the degrees of freedom that are associated with the test statistic?


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