Mike, a Plumbing Contractor, Was Hired to Correct a Stoppage

question 64

True/False

Mike, a plumbing contractor, was hired to correct a stoppage in the sewer line at Sarah's house. During his work, he discovered numerous leaks in a rusty, defective water pipe that ran parallel with the sewer line. To meet public regulations, the water pipe had to be replaced either then or later, when the yard would have to be redug. Mike replaced the water pipe and Sarah inspected the work daily and did not object to the extra work. When Mike finished, Sarah refused to pay for the water pipe replacement since that was not what she originally hired Mike to do and she had never specifically agreed to that work. Sarah must pay Mike for his labor and materials costs for both the sewer and water line repair.

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Definitions:

Regression Line

A line of best fit through a scatter plot of data points that shows the relationship between independent and dependent variables in regression analysis.

Sum of Squares

A statistical technique used to describe the total variation in a dataset.

Regression

A statistical approach for modeling how a dependent variable is related to one or more independent variables.

Error

The difference between a measured or observed value and the true, specified, or theoretically correct value, often used in the context of statistical or experimental analyses.