TABLE 13-8
It Is Believed That GPA (Grade Point $A C T$

question 177

Multiple Choice

TABLE 13-8
It is believed that GPA (grade point average, based on a four point scale) should have a positive linear relationship with ACT scores. Given below is the Excel output from regressing GPA on ACT scores using a data set of 8 randomly chosen students from a Big-Ten university.
Regressing GPA on $A C T$
$\begin{array}{lc}\text { Regression Statistics } \\\hline \text { Multiple R } & 0.7598 \\\text { R Square } & 0.5774 \\\text { Adjusted R Square } & 0.5069 \\\text { Standard Error } & 0.2691 \\\text { Observations } & 8\end{array}$
ANOVA
$\begin{array}{lccccc} & d f & S S & M S & F & \text { Significance } F \\\hline \text { Regression 1 } & 0.5940 & 0.5940 & 8.1986 & 0.0286 \\\text { Residual } & 6 & 0.4347 & 0.0724 & & \\\text { Total } & 7 & 1.0287 & & & \\\hline\end{array}$

$\begin{array}{lrrrrrr}\hline & \text {Coefficients }& \text {Standard Error }& \text {T Stat }& \text { p -value }& \text {Lower 95\%}& \text { Upper 95\% } \\\hline \text { Intercept} & 0.5681 & 0.9284 & 0.6119 & 0.5630 & -1.7036 & 2.8398 \\ \text {ACT }& 0.1021 & 0.0356 & 2.8633 & 0.0286 & 0.0148 & 0.1895 \\\hline\end{array}$


-Referring to Table 13-8, the value of the measured test statistic to test whether there is any linear relationship between GPA and ACT is

• A) 0.7598.
• B) 0.0356.
• C) 0.1021.
• D) 2.8633.

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Definitions:

CEMF

Counter electromotive force, which is the voltage generated by a running motor that opposes the applied voltage.

VFD Senses

Refers to the ability of a Variable Frequency Drive to detect and respond to changes in load or environmental conditions.

Rectifier

An apparatus that transforms AC (alternating current) into DC (direct current).

AC Input Power

AC input power refers to the electrical power supplied to a device or system in alternating current form.