Final answer:
To find the mean of a data set, add up all the values and divide by the number of values.
Step-by-step explanation:
To calculate the mean of a data set, you need to add up all the values and then divide the sum by the number of values. In this case, the hourly wages of the seven employees are: $18, $20, $15, $25, $14, $10, $10.
Adding all of these together gives us a sum of $112. So, to find the mean, we divide $112 by 7 (the number of values in the data set). The mean hourly wage is approximately $16.