In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of 6 students were given the exam before and after taking the course. The results are shown below.
Let d = Score After - Score Before. 
a.Compute the test statistic.
b.At 95% confidence using the p-value approach, test to see if taking the course actually increased scores on the driving exam.
Definitions:
Production Possibilities Curve
A graphical representation showing the maximum combination of goods and services that can be produced in a given period with available resources, illustrating the trade-offs and opportunity costs.
Units of Guns
A measure or quantity of firearms; colloquially, it can refer to military spending or resources in discussions of trade-offs between defense and civilian spending.
Units of Butter
A measurement used to quantify butter, typically in pounds or kilograms, often used as an example in economic theories to explain concepts like trade-offs and opportunity costs.
Opportunity Cost
Failing to capitalize on potential gains from other alternatives when making a singular choice.
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