The Following Display from a TI-84 Plus Calculator Presents a $n _ { 1 } = 8 \text { and } n _ { 2 } = 13$

question 17

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 $n _ { 1 } = 8 \text { and } n _ { 2 } = 13$

How many degrees of freedom did the calculator use?

• A) 15.229294
• B) -0.549
• C) 105.095
• D) -35.082

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Definitions:

Price Elasticity

A parameter that indicates the extent to which demand for a good is influenced by its price changes.

Demand Schedule

A table showing the quantity of a good or service that consumers are willing to buy at various prices.

Demand Curve

A graphical representation showing the relationship between the price of a good and the quantity demanded by consumers.

Perfectly Elastic

A demand situation where a small change in price leads to an infinite change in the quantity demanded.