There Are a Number of Highly Touted Search Engines for Finding

question 68

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) H0 : μ1 = μ2
• B) H0 : p1 ≠ p2
• C) H0 : 1 = 2
• D) H0 : p1 = p2

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Definitions:

Scan Time

The period required for a programmable logic controller (PLC) to read its inputs, execute its program, and update its outputs.

Sporadic Reliability

A term indicating an unpredictable level of reliability, where the performance or function of a system or component is irregular and not consistently dependable.

Hardwired Relay Schematic

A diagram that represents the physical wiring and logic connections of relays within a control system.