A large department store has collected the following monthly data on lost sales revenue due to theft and the number of security guard hours on duty:
Lost Sales Revenue
in Thousands Total Guard Hours
1.0 600
1.4 630
1.9 1000
2.0 1200
1.8 950
2.1 1300
2.3 1350
find out the coefficient of correlation.
coefficient of correlation = 0.0014
coefficient of correlation = 0.3780
coefficient of correlation = 0.955
coefficient of correlation = 0.6785