Imagine you are the sales manager for a large team of sales representatives. You are considering implementing a new compensation system and want to see if implementing the system will increase individuals' monthly sales. You examine the sales of 12 sales representatives who received the new system, and 17 representatives who did not (use the old system). The sales representatives who received the new system had a mean monthly individual sales of $28,567, with a sample standard deviation of 3,349. The sales representatives who did not receive the new system had mean monthly individual sales of $26,974, with a sample standard deviation of 2,974.