Instruction 12-9
It Is Believed That,the Average Numbers of Hours

question 56

Multiple Choice

Instruction 12-9
It is believed that,the average numbers of hours spent studying per day (HOURS) during undergraduate education should have a positive linear relationship with the starting salary (SALARY,measured in thousands of dollars per month) after graduation.Given below is the Microsoft Excel output for predicting starting salary (Y) using number of hours spent studying per day (X) for a sample of 51 students.NOTE: Only partial output is shown.
$\begin{array}{|l|r|}\hline{\text { Regression Statistics }} \\\hline \text { Multiple R } & 0.8857 \\\hline \text { R Square } & 0.7845 \\\hline \text { Adjusted R Square } & 0.7801 \\\hline \text { Standard Error } & 1.3704 \\\hline \text { Observations } & 51 \\\hline\end{array}$
ANOVA
$\begin{array}{|l|r|r|c|c|c|}\hline & d f & \text { SS } & \text { MS } & F & \text { Significance } F \\\hline \text { Regression } & 1 & 335.0472 & 335.0473 & 178.3859 & \\\hline \text { Residual } & & & 1.8782 & & \\\hline \text { Total } & 50 & 427.0798 & & & \\\hline\end{array}$


$\begin{array}{l|r|rr|r|r|r|} \hline& \text { Coefficients } & \text { Standered Error } & t \text { Stat } & \text { P-value } & \text { Lorer 95\% } & \text { Upper 95\% } \\\hline \text { Intercept } & -1.8940 & 0.4018 & -4.7134 & 2.051 \mathrm{E}-05 & -2.7015 & -1.0865 \\\hline \text { Hours } & 0.9795 & 0.0733 & 13.3561 & 5.944 \mathrm{E}-18 & 0.8321 & 1.1269 \\\hline\end{array}$ Note: 2.051E-05 = 2.051 * 10^-0.5 and 5.944E-18 = 5.944 * 10^-18.
-Referring to Instruction 12-9,the estimated average change in salary (in thousands of dollars) as a result of spending an extra hour per day studying is

• A)0.9795.
• B)0.7845.
• C)335.0473.
• D)-1.8940.

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Definitions:

Study

The act of dedicating time and attention to acquiring knowledge on a subject, through reading, observation, or research.

Diagnosis

The identification of the nature or cause of a phenomenon, often related to identifying diseases based on symptoms.

Guided Group Interaction

A method used to encourage open and structured conversation among group members to enhance understanding and solve problems collaboratively.

Social Learning Theory

A theory that suggests individuals learn new behaviors by observing and imitating others, as well as through the rewards and punishments these behaviors produce.