The following data give the number of computer units sold per day by a random sample of six salespersons before and after a bonus plan was implemented. $\begin{array}{ll}\text { Salesperson } & \text { Before } & \text { After }\
1&3 & 6 \
2&7 & 5 \
3&6 & 6 \
4&8 & 7 \
5&7 & 8 \
6&9 & 8
\end{array}$ At 95% confidence, test to see if the bonus plan was effective. That is, did the bonus plan actually increase sales?

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The Answer of The following data give the number of computer units sold per day by a random sample of six salespersons before and after a bonus plan was implemented. $\begin{array}{ll}\text { Salesperson } & \text { Before } & \text { After }\
1&3 & 6 \
2&7 & 5 \
3&6 & 6 \
4&8 & 7 \
5&7 & 8 \
6&9 & 8
\end{array}$ At 95% confidence, test to see if the bonus plan was effective. That is, did the bonus plan actually increase sales?

The Following Data Give the Number of Computer Units Sold