Discuss the below:
Q: Does ad placement matter? 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:
Ad source n x s
Wall Street Journal 66 4.77 1.50
National Enquirer 61 2.43 1.64
(a) Compare the two sources of ads using a t test. Be sure to state your null and alternative hypotheses, the test statistic with degrees of freedom, the P- value, and your conclusion.
(b) Give a 95% confidence interval for the difference.
(c) Write a short paragraph summarizing the results of your analyses.