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 data: Sample Standard Deviation 1.50 1.64 Ad source Wall Street Journal 66 National Enquirer Mean size 4.77 2.43 61 Compare the two sources using a t-test and state your conclusions. Include a P-value in your summary. Also include a 95% confidence interval for the true difference in the trustworthiness for these two sources.

Answer 1

te poational enqudu potesis - 2.34 E 8 3691

t S2 3 0 582 888 Qd 3u- 0548 17: - C1 792, 2. 885