Exercise 2: Prepare and describe data

Using data/employee_survey.csv:

1. Count employees by department.
2. Calculate mean, median, SD, minimum, and maximum of performance.
3. Count missing values in performance and job_satisfaction.
4. Compare mean performance across departments.
5. Draw a histogram of performance.
6. Draw a boxplot of performance by training group.
7. Explain one pattern visible in the graph.
8. Write one descriptive statement the data support.
9. Write one causal statement the descriptive analysis does not support.
10. Optional: create work_mode from remote_days.