Answer:
The correct option is 2. The mean decreases, and the median remains the same.
Step-by-step explanation:
The formula of mean is
[tex]Mean=\frac{\text{Sum of observations}}{\text{Number of observation}}[/tex]
Since the person earning $15 per hour quits and is replaced with a person earning $8 per hour, therefore
[tex]\text{New sum of employees earnings}=\text{sum of employees earnings}-15+8[/tex]
[tex]\text{New sum of employees earnings}=\text{sum of employees earnings}-7[/tex]
Since sum of employees earnings decreased by $7, therefore the mean will decreases.
In a box plot the line inside the box represent the median.
From plot 1 we can say that the median is 9.5. From plot 2 we can say that the median is 9.5.
Therefore the median remain the same.
Option 2 is correct, the mean decreases, and the median remains the same.
