Top Internet search engines. Smart Insights reported on the search shares (i.e., percentage of all Internet searches)

Question:

Top Internet search engines. Smart Insights reported on the “search” shares (i.e., percentage of all Internet searches) for the most popular search engines available on the Web. In Jan. 2020, Google accounted for 73% of all worldwide searches, Baidu for 10%, Yahoo! for 2%, Bing for 12%, and all other search engines for 3%. Suppose that in a random sample of 1,000 recent Internet searches, 720 used Google, 115 used Baidu, 27 used Yahoo, 108 used Bing, and 30 used another search engine.

a. Do the sample data disagree with the percentages reported by Smart Insights? Test using a = .05.

b. Find and interpret a 95% confidence interval for the percentage of all Internet searches that use the Google search engine.

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Ali Khawaja

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