You Have Collected Data on the Approximate Retail Price (In

question 20

Multiple Choice

You have collected data on the approximate retail price (in $) and the energy cost per year (in $) of 15 refrigerators.Which of the following is the best for presenting the data?

• A)A pie chart.
• B)A scatter plot
• C)A side-by-side bar chart.
• D)A contingency table.

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Definitions:

Covariance

A measure indicating the extent to which two random variables change in tandem.

Covariance

A measure that indicates the extent to which two variables change together, showing if increases in one variable correspond to increases or decreases in another.

Degrees Of Freedom

The number of values in the calculation of a statistic that are free to vary, often related to the sample size.

Pearson Correlation

A measure of the linear correlation between two variables, giving a value between -1 and 1 inclusive, where 1 is total positive linear correlation, 0 is no linear correlation, and -1 is total negative linear correlation.