There Are a Number of Highly Touted Search Engines for Finding

question 53

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,what is the null hypothesis to be tested?

• A) : =
• B) : ≠
• C) : =
• D) : =

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Definitions:

Torsional Strain

The resistance that occurs when molecules twist about their bonds, leading to a decrease in stability due to the repulsion between electrons in eclipsed conformations.

Newman Projection

is a way to visualize the spatial arrangement of bonds from the perspective of looking down the bond axis between two carbon atoms in a molecule.

C2-C3 Bond

A bond linking the second and third carbon atoms in a carbon chain, important in understanding the structure of organic molecules.

2,3-Dimethylbutane

A branched chain alkane with the formula C6H14, having methyl groups at the second and third carbon atoms of the butane chain.