Use the Data Given Below to Answer the Following Question(s)

question 49

Multiple Choice

Use the data given below to answer the following question(s) .
Following is an extract from the database of a construction company.The table shows the height of walls in feet and the cost of raising them.The estimated simple linear regression equation is given as Ŷ = b0 + b1X.(Hint: Use Excel functions) .
$$\begin{array} { | r | r | } \hline \begin{array} { l } \text { Height } \\\text { (ft) }\end{array} & \text { Cost (\$) } \\\hline 4 & 670 \\\hline 3 & 430 \\\hline 7 & 810 \\\hline 9 & 1100 \\\hline 6 & 790 \\\hline 8 & 880 \\\hline 5 & 760 \\\hline 11 & 1200 \\\hline\end{array}$$
-The R² value:

• A)is the variability of the observed Y-values from the predicted values.
• B)indicates that as the independent variable increases, the intercept term does too.
• C)gives the proportion of variation in the dependent variable that is explained by the independent variable.
• D)transforms the cumulative probability scale (vertical axis)so that the graph of the cumulative normal distribution is a straight line.

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Definitions:

Nosepiece

Part of a microscope or other optical instrument where the selection of lenses occurs, also known as a turret.

Wet-Mount

A simple microscopic slide preparation technique where a drop of liquid sample is placed between a slide and a cover slip.

Coarse Adjustment Knob

Part of a microscope used for making the initial, rough focusing of the lens on the specimen.

Coverslip

A thin piece of glass or plastic placed over specimens on a microscope slide, holding the specimen in place and providing a clear viewing surface.