Boxplot statistics
Variable	lower whisker	lower hinge	median	upper hinge	upper whisker
Pre-test	8.36	14.93	19.345	21.55	30.33
Post-test1	7.55	19.645	26.98	35.495	55.21
Post-test2	8.78	21.33	32.86	45.77	71.33

Boxplot Notches
Variable	lower bound	median	upper bound
Pre-test	18.3901735229198	19.345	20.2998264770802
Post-test1	24.6938973320664	26.98	29.2661026679336
Post-test2	29.3349306495711	32.86	36.3850693504289