Use the Following Information for Following Questions

question 20

Multiple Choice

Use the following information for following questions . The average travel time to work for a person living and
working in Kokomo, Indiana is 17 minutes. Suppose the standard deviation of travel time to work is 4.5 minutes and
the distribution of travel time is approximately normally distributed.
-Approximately what percentage of people living and working in Kokomo have a travel time to work that is less than 12.5 minutes? Round to the nearest whole percent.

• A)16%
• B)68%
• C)5%
• D)84%.

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Definitions:

Causal Inferences

Conclusions about cause-and-effect relationships, often deduced from the manipulation of variables in experimental designs.

Internal Validity

The extent to which the results of a study can be attributed to the variables under investigation rather than to other extraneous factors.

Quantitative Designs

Research strategies that focus on numerical data, statistical analysis, and the objective quantification of variables.

Qualitative Designs

Are research strategies focusing on descriptive, non-numerical data to understand concepts, thoughts, or experiences.