The large department store has gathered given monthly data on lost sales revenue because of theft and number of security guard hours on duty:
Lost Sales Total Security Lost Sales Revenue Total Security
Guard hours Guard hours
1.0 600 1.8 950
1.4 630 2.1 1300
1.9 1000 2.3 1350
2.0 1200
i) Find least squares regression equation.
ii) Using results of part (a), determine evaluated lost sales revenues if total number of security guard hours is 800.
iii) Compute coefficient of correlation.
v) Compute coefficient of determination.