In Their October 2003 Issue, Consumer Reports Evaluated the Price

question 41

Multiple Choice

In their October 2003 issue, Consumer Reports evaluated the price and
Performance of 23 models of cordless phones. Computer output gives the summary
Statistics for the prices ($) shown in the table. The IQR for these data is $$\begin{array} { | c | c | c | c | c | c | c | } \hline \text { Min } & \text { Q1 } & \text { Median } & \text { Q3 } & \text { Max } & \text { Mean } & \text { SD } \\\hline 15 & 30 & 50 & 110 & 200 & 71.75 & 52.08 \\\hline\end{array}$$

• A) $ 80
• B) $ 185
• C) $ 55
• D) $ 90
• E) $52.08

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Definitions:

Confidence Interval Estimate

A range of values defined so that there is a specified probability that the value of a parameter lies within it.

Coefficient Of Determination

A statistical measure that assesses the proportion of variance in the dependent variable predictable from the independent variable(s).

Coefficient Of Correlation

A numerical measure that quantifies the strength and direction of a linear relationship between two variables.

Square Root

A value that, when multiplied by itself, gives the original number.