A Student Completing a Research Project for a Criminal Justice

question 30

Multiple Choice

A student completing a research project for a criminal justice class obtained a radar gun for determining automobile speeds and recorded the speeds of automobiles passing a fixed location over a period of several hours. The student was unaware that the device needed to be recharged after two hours of use and that the speeds recorded after two hours were not reliable. What type of problem has occurred?

• A) selection bias
• B) nonresponse bias
• C) measurement error

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Definitions:

TCritical One-Tail

A value on the t-distribution that is used in a one-tailed t-test to determine the statistical significance of a result.

P(T>=t) One-Tail

The probability that the test statistic T is greater than or equal to some value t, assuming the null hypothesis, used in one-tailed tests.

Treatment Group

A group of subjects or elements that receive the variable being tested in an experiment.

Mean Response Time

The average time taken to respond to a set of requests, often used as a performance metric in various fields.