A company attempts to evaluate the potential for a new bonus plan by selecting a sample of 4 salespersons to use the bonus plan for a trial period. The weekly sales volume before and after implementing the bonus plan is shown below. (For the following matched samples, let the difference "d" be d = after - before.) 
a.State the hypotheses.
b.Compute the test statistic.
c.Use Alpha = .05 and test to see if the bonus plan will result in an increase in the mean weekly sales.
Definitions:
Bounce Height
The vertical distance a object travels upward after impacting a surface and rebounding.
Drop Height
Drop height refers to the vertical distance through which an object is allowed to fall freely in experiments or applications, affecting outcomes like impact force or bounce.
NHL Team
A professional ice hockey team that is a member of the National Hockey League, consisting of teams from both Canada and the United States.
Average Attendance
The mean number of individuals present over a series of events or over a period of time, calculated by summing the total attendance and dividing by the number of events or time intervals.
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