Histograms and Bar Plots
1. Histogram for employee satisfaction and last evaluation
Employee satisfaction levels are roughly normally distributed, with
a slight skew towards higher satisfaction.

Employee last evaluations are skewed right, with most employees
receiving evaluations between 0.5 and 0.9.

2. Bar plot for the average satisfaction of employees.
Employees who stayed at the company reported significantly higher
average satisfaction levels than those who left.
