Internet search engines report many hits, but getting on the first page is critical for a business. A study surveyed
(a) Might the comparison between these two samples be confounded with a hidden factor? If so, identify such a factor.
(b) Find the 95% confidence interval for the difference between the proportion of users who click on a link on the first page of the search results in the two surveys.
(c) What do the results tell businesses about the importance of improving their search rank?
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Question Posted: July 14, 2015 09:41:38