The Following Display from a TI-84 Plus Calculator Presents A 95

question 24

Multiple Choice

The following display from a TI-84 Plus calculator presents a $95 \%$ confidence interval for the difference between two means. The sample sizes are $n _ { 1 } = 10$ and $n _ { 2 } = 15$ .

How many degrees of freedom did the calculator use?

• A) -0.439
• B) -41.874
• C) 19.678187
• D) 80.827

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Definitions:

False Positive

An error in data testing or diagnostic screening in which a test result improperly indicates the presence of a condition.

Leakage

The escape of resources from one part of an economy to another, often referring to money that is not retained within a local system.

Control Group

In experimental research, the group that does not receive the experimental treatment, serving as a baseline to compare the effects of the treatment.

False Positives

An error in which a test incorrectly indicates the presence of a condition that is not actually there.