In a small town, the relationship between robberies and police officers on aduty has been collected. X represents the number of police officers on duty and y represents the number of reported thefts.
x 10 15 16 1 4 6 18 12 14 7
y 5 2 1 9 7 8 1 5 3 6
Find r
At a= 0.01, what is the critical value?
What is the centroid?