The hourly wages earned by 20 employees are shown in the first box and whisker plot below The person earning 1 per hour quits and is replaced with a person earning 8 per hour The graph of the resulting salaries is shown in plot 2 7 8 9 10 11 12 13 14 15 Plot 1 7 8 9 10 11 12 13 14 15 Plot 2 How does the mean and median change from plot 1 to plot 2 The mean and median remain the same The mean decreases and the median remains the same