Question

Corporate advertising tries to enhance the image of the corporation. A study compared two ads from two sources, the Wall Street Journal and the National Enquirer. Subjects were asked to pretend that their company was considering a major investment in Performax, the fictitious sportswear firm in the ads. Each subject was asked to respond to the question "How trustworthy was the source in the sportswear company ad for Performax?" on a 7-point scale. Higher values indicated more trustworthiness. Here is a summary of the results. source ational Enquirer 61 2.43 1.64 (a) Find the two-sample pooled t statistic. Calculate the pooled standard deviation. Round your answer to 4 decimal places Degrees of freedom t statistic. Round your answer to 3 decimal places. (b) This problem can also be solved with an ANOVA. The ANOVA output is shown below. How does thet statistic you calculated above compare with the F statistic shown in the table? O F- tsquared o t and F are not related o tFsquared ANOVA p-value Source of Variation Factor Error SS 173.58 307.63 MS 1 173.58 70.53 125 2.46 Total 481.21 126

Answer 1