The following table shows the monthly sales (in units) of six salespersons before and after a bonus plan was introduced.Using α = .05, determine whether the bonus plan has increased sales significantly.Assume the population of differences is normally distributed.(For the following matched samples, let the difference d = After - Before.)

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The Answer of The following table shows the monthly sales (in units) of six salespersons before and after a bonus plan was introduced.Using α = .05, determine whether the bonus plan has increased sales significantly.Assume the population of differences is normally distributed.(For the following matched samples, let the difference d = After - Before.)

The Following Table Shows the Monthly Sales (In Units) of Six