Consider the Five Number Summary of Hourly Wages ($) for a Sample

question 7

Multiple Choice

Consider the five number summary of hourly wages ($) for a sample of advertising / promotion managers. $$\begin{array} { | c | c | c | c | c | } \hline \text { Min } & \text { Q1 } & \text { Median } & \text { Q3 } & \text { Max } \\\hline 19.64 & 29.36 & 34.18 & 40.86 & 57.26 \\\hline\end{array}$$ Suppose there had been an error and that the lowest hourly wage was $15.50 instead of
$19) 64.This would result in

• A)an increase in the median.
• B)an increase in the standard deviation.
• C)a decrease in the range.
• D)a decrease in the IQR.
• E)an increase in the mean.

---

Definitions:

Independent Variable

The variable that is manipulated in an experiment to test its effects on the dependent variable.

Dependent Variable

A variable in an experiment that is expected to change in response to manipulations of the independent variable.

Correlational Study

A research methodology that examines the relationship or association between two or more variables without determining causal direction.

Experimental Study

A research methodology that manipulates one variable to determine if it causes a change in another variable, usually in a controlled environment.