Use the following sample dataset of police officers to answer questions 15-20 (4 points each).

Police Officer Number	Highest Level of Education	Age	Average Hours Worked Per Week
1	High School	24	40
2	Two-Year Degree	51	40
3	Two-Year Degree	40	40
4	Four-Year Degree	38	45
5	Four-Year Degree	23	50
6	Two-Year Degree	25	42
7	Some Graduate School	26	41
8	Four-Year Degree	27	40
9	Two-Year Degree	28	40
10	Master's Degree	34	40

15. What is mode for highest level of education? _____________________________________

16. What is the mode for average hours worked per week? ______________________________

17. What is the median for age? ________________________________

18. What is the mean for age? __________________________

19. What is the range for average hours worked per week? _______________________

20. What is the interquartile range for average hours worked per week? ____________________