Use the Following Information for Questions -Using the High-Low Method, What Is the Slope for This

question 54

Multiple Choice

Use the following information for questions
$\begin{array}{c}\begin{array}{l}\\\underline{\text { Month }} \\\text { Jan } \\\text { Feb } \\\text { Mar } \\\text { Apr } \\\text { May } \\\text { Jun } \\\text { Jul } \\\text { Aug }\end{array}\begin{array}{ll}\text { \# Machine } & \text { Maintenance } \\ \underline{\text { Hours (X) }} & \underline{ \text { Costs(Y) }}\\3,000 & \$ 440 \\4,500 & \$ 690 \\8,000 & \$ 510 \\ 7,000 & \$ 600 \\6,000 & \$ 550 \\9,000 & \$ 980 \\3,500 & \$ 840 \\5,500 & \$ 600 \end{array}\end{array}$


-Using the high-low method, what is the slope for this set of data?

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Definitions:

Coefficient Of Determination

A statistical measure, often symbolized as R^2, that represents the proportion of the variance in the dependent variable predictable from the independent variable(s).

Correlation Coefficient

A measure that determines the degree to which two variables' movements are associated, ranging from -1 (perfect negative correlation) to +1 (perfect positive correlation).

Prediction Interval

An estimate of an interval in which future observations will fall, with a certain degree of confidence, based on a predictive model.

Linear Regression

A mathematical approach that models how a dependent variable changes based on one or several independent variables, by adapting a linear equation to the data collected.