Instruction 12-8
It Is Believed That Average Grade (Based on a Four

question 131

Multiple Choice

Instruction 12-8
It is believed that average grade (based on a four -point scale) should have a positive linear relationship with university entrance exam scores.Given below is the Microsoft Excel output from regressing average grade on university entrance exam scores using a data set of eight randomly chosen students from a large university.
Regressing average grade on university entrance exam score }\\
Regression Statistics
$\begin{array}{|lr}\hline \text { Multiple R } & 0.7598 \\\text { R Square } & 0.5774 \\\hline \text { Adjusted R Square } & 0.5069 \\\hline \text { Standard Error } & 0.2691 \\\hline \text { Observations } & 8 \\\hline\end{array}$
ANOVA
$\begin{array}{|lllll|r|r|}\hline & d f & {\text { SS }} & \text { MS } & F & \text { Significance F } \\\hline \text { Regression } & 1 & 0.5940 & 0.5940 & 8.1986 & 0.0286 \\\hline \text { Residual } & 6 & 0.4347 & 0.0724 & & \\\hline \text { Total } & 7 & 1.0287 & & & \\\hline\end{array}$
$\begin{array}{|l|r|r|r|r|r|r}\hline & \text { Coefficients } & \text { Standard Error } & \text { t Stat } & \text { P-value } & \text { Lower 95\% } & \text { Upper 95\% } \\\hline \text { Intercept } & 0.5681 & 0.9284 & 0.6119 & 0.5630 & -1.7036 & 2.8398 \\\hline \text { University entrance } & & & & & & 0.1895 \\\text { exam score } & 0.1021 & 0.0356 & 2.8633 & 0.0286 & 0.0148 & 0.1895 \\\hline\end{array}$
-Referring to Instruction 12-8,the interpretation of the coefficient of determination in this regression is

• A)average grade accounts for 57.74% of the variability of university entrance exam scores.
• B)university entrance exam scores account for 57.74% of the total fluctuation in average grade.
• C)57.74% of the total variation of university entrance exam scores can be explained by average grade.
• D)None of the above.

Understand the principles underlying theories of water and sugar movement in plants, including cohesion-tension theory and pressure flow theory.

Distinguish between the various plant structures and their specific roles, including root-related structures.

Comprehend the mechanisms of gas exchange in plants, focusing on the role and regulation of stomata.

Understand the functions and composition of plant root structures, including the Casparian strip.

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