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:
Formula
An expression or equation that describes a mathematical relationship between quantities.
Slope Value
It's the calculation of how slanted a line is, determined by dividing the vertical movement by the horizontal movement between any two points on the line.
Points
Specific locations in two-dimensional or three-dimensional space, typically defined by coordinates.
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