Case Study 7.4: Measuring Quality Time
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Variables:
MONTH Production Month
BATCH Amount of product made
AQI Quality indexCounty Code
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c74.dat:
Month Batch AQI
jan94 2339 86.63
feb94 2275 84.60
mar94 2881 87.04
apr94 2780 87.19
may94 3227 87.91
jun94 3291 87.99
jul94 2944 88.09
aug94 3163 88.25
sep94 2770 87.62
oct94 2827 87.43
nov94 2392 86.74
dec94 1973 84.86
jan95 3006 87.44
feb95 2924 87.77
mar95 3592 88.09
apr95 3460 88.53
may95 3807 88.11
jun95 3753 88.59
jul95 3648 88.67
aug95 3698 88.87
sep95 3166 89.92
oct95 3159 88.93
nov95 2545 87.17
dec95 2208 89.07
jan96 2971 89.25
feb96 3083 90.54
mar96 3504 89.89
apr96 3580 90.28
may96 3855 89.46
jun96 3894 89.42
jul96 3772 89.28
aug96 3705 89.17
sep96 3364 90.42
oct96 3341 90.46
nov96 2680 88.63
dec96 2418 89.74
jan97 2963 90.48
feb97 2890 89.76
mar97 3455 90.20
apr97 3747 90.68
may97 3685 90.19
jun97 3672 89.78
jul97 3865 89.72
aug97 3729 90.78
sep97 3205 90.32
oct97 3158 90.64
nov97 2552 90.97
dec97 2135 90.23