There Are a Number of Highly Touted Search Engines for Finding

question 109

Multiple Choice

There are a number of highly touted search engines for finding things of interest on the Internet. Recently, a consumer rating system ranked two search engines ahead of the others. Now, a computer user's magazine wishes to make the final determination regarding which one is actually better at finding particular information. To do this, each search engine was used in an attempt to locate specific information using specified keywords. Both search engines were subjected to 100 queries. Search engine 1 successfully located the information 88 times and search engine 2 located the information 80 times. Using a significance level equal to 0.05, which of the following is true?

• A) Based the sample data, the null hypothesis of equal population proportions is rejected since the test statistic exceeds the critical value.
• B) Based on the sample data, the null hypothesis should not be rejected since the test statistic of z = 2.04 exceeds the critical value of z = 1.96.
• C) According to the test results, the hypothesis should be rejected since the test statistic value, z = 1.54, falls in the rejection region.
• D) Based on the sample data, there is not sufficient evidence to conclude that a difference exists between the proportion of search hits since the test statistic, z = 1.54, does not fall in the rejection region.

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Definitions:

Older

A comparative term used to describe someone or something of greater age or the process of aging or becoming older.

Cohort Effect

The influence that shared characteristics or experiences of a group have on the results of a study, due to members of the group having been born at or around the same time.

Young Adults

Individuals in the age range from late teens through the twenties, often considered the transitional phase from adolescence to adulthood.

Computers

Electronic devices capable of executing programmed instructions to process and store information, perform calculations, and control other devices.