The following shows the monthly sales in units of six salespersons before and after a bonus plan was introduced. At 95% confidence, determine whether the bonus plan has increased sales significantly. (For the following matched samples, let the difference "d" be: d = after - before.)
Definitions:
Deferred Payment Plan
A payment arrangement that allows a purchaser to pay for goods or services at a later date, often after receiving some form of benefit from them.
Retroactive APR
Annual Percentage Rate that is applied to charges made previously, often after a promotional period ends or due to a late payment.
Monthly Periodic Rate
The APR divided by 12; the rate of interest charged each month.
Finance Charge
The interest that is charged to a buyer when paying for a purchase or service over time.
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