The Internal Revenue Service (IRS)is Interested in Estimating the Mean

question 67

Multiple Choice

The Internal Revenue Service (IRS) is interested in estimating the mean amount of money spent on outside tax service by income tax filers filing as single on their individual form.To do this,they have selected a random sample of n = 16 people from this population and surveyed them to determine the sample mean and sample standard deviation.The following information was observed: = $88.60 s = $30.79 Given this information,what is the 95 percent confidence interval for the mean dollars spent on outside tax assistance by taxpayers who file as single?

• A)Approximately $72.19 - $105.01
• B)About $22.97 - $154.23
• C)Approximately $80.90 - $96.30
• D)About $ 28.25 - $148.95

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Definitions:

Operationalization

The process of defining a fuzzy concept so as to make the concept measurable and to understand it in terms of empirical observations.

Hawthorne Effect

The effect that researchers themselves may have on an experimental group. The effect is named after an organizational study in which employees were found to be responding to the perceived interest of management rather than to the experimental condition itself.

External Validity

The extent to which the results of a study can be generalized to other situations, populations, or time periods beyond the study itself.

Diffusion

In experimental design, the problem of a treatment effect spreading from group to group as people communicate.