574 Higher Engineering Mathematics
Miles
Orders taken
travelled
(£ 000)
1370
23
1050
17
980
19
1770
22
1340
27
1560
23
2110
30
1540
23
1480
25
1670
19
[0.632]
7. The data shown below refers to the number
of times machine tools had to be taken out of
service, in equal time periods, due to faults
occurring and the number of hours worked by
maintenance teams. Calculate the coefficient
of correlation for this data.
Machines
out of
service:
4 13 2 9 16 8 7
Maintenance
hours:
400 515 360 440 570 380 415
[0.937]