House Calls a Local Plumber Makes House Calls B This Past Month, the Time the Plumber Spent on $30

question 526

Essay

House calls A local plumber makes house calls. She charges $30 to come out to the house
and $40 per hour for her services. For example, a 4-hour service call costs $30 + $40(4) =
$190.
a. The table shows summary statistics for the past month. Fill in the table to find out the
cost of the service calls. $$\begin{array} { | l | c | l | } \hline \text { Statistic } & \text { Hours of Service Call } & \text { Cost of Service Call } \\\hline \text { Mean } & 4.5 & \\\hline \text { Median } & 3.5 & \\\hline \text { SD } & 1.2 & \\\hline \text { IQR } & 2.0 & \\\hline \text { Minimum } & 0.5 & \\\hline\end{array}$$
b. This past month, the time the plumber spent on one service call corresponded to a
z-score of - 1.50. What was the z-score for the cost of that service call?

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Definitions:

Cornerstone of Prosperity

A fundamental basis or condition required for economic growth or success.

Socialist Model

An economic and political system where the means of production, distribution, and exchange are owned or regulated by the community as a whole.

Vertical Integration

Company’s avoidance of middlemen by producing its own supplies and providing for distribution of its product.

Union Membership

Refers to individuals who belong to a labor union, organizations that represent workers' interests in negotiations with employers over wages, benefits, and working conditions.