Instruction 10-4
To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are given below.
$$\begin{array} { c c c }
\text { Student } & \begin{array} { c }
\text { Exam Score } \
\text { Before Course }
\end{array} & \begin{array} { c }
\text { Exam Score } \
\text { After Course (2) }
\end{array} \
& ( 1 ) & \
1 & 530 & 670 \
2 & 650 & 770 \
3 & 910 & 1,000 \
4 & 700 & 710 \
5 & 450 & 550 \
6 & 820 & 870 \
7 & 820 & 770 \
8 & 630 & 610
\end{array}$$
-Referring to Instruction 10-4,at the 0.05 level of significance,the conclusion for this hypothesis test is that there is sufficient evidence that
A) the business school preparation course does not improve exam score.
B) the business school preparation course does improve exam score.
C) the business school preparation course has no impact on exam score.
D) No conclusion can be drawn from the information given.

Question

Instruction 10-4
To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are given below.
 $$\begin{array} { c c c } 
\text { Student } & \begin{array} { c } 
\text { Exam Score } \
\text { Before Course }
\end{array} & \begin{array} { c } 
\text { Exam Score } \
\text { After Course (2) }
\end{array} \
& ( 1 ) & \
 1  & 530 & 670 \ 
2 & 650 & 770 \
3 & 910 & 1,000 \
4 & 700 & 710 \
5 & 450 & 550 \
6 & 820 & 870 \
7 & 820 & 770 \
8 & 630 & 610
\end{array}$$
-Referring to Instruction 10-4,at the 0.05 level of significance,the conclusion for this hypothesis test is that there is sufficient evidence that
A) the business school preparation course does not improve exam score.
B) the business school preparation course does improve exam score.
C) the business school preparation course has no impact on exam score.
D) No conclusion can be drawn from the information given.

Quizplus · Accepted Answer

We need to conduct a paired-samples t-test since we are comparing the same group of students before and after the course. Using a t-test, we obtain a p-value of 0.02 which is less than 0.05. Therefore, we can reject the null hypothesis that the business school preparation course does not improve exam score. The alternative hypothesis that the business school preparation course does improve exam score is supported by the data. Therefore, the conclusion of the hypothesis test is that there is sufficient evidence that the business school preparation course does improve exam score.

Instruction 10-4 to Test the Effectiveness of a Business School

Instruction 10-4
to Test the Effectiveness of a Business School