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TABLE 18.10 Effects and Variation Explained in Garbage Collection Study

Factor Effect Percentage of
Variation
Confidence
Interval

I 168.48 138.1 (168.386, 168.573)
A –84.02 34.4 (–84.114, –83.927)
B 0.27 0.0 (0.177, 0.364)
C 0.56 0.0 (0.469, 0.656)
D 104.19 52.8 (104.094, 104.281)
AB –0.23 0.0 (–0.323, –0.136)
AC 0.56 0.0 (0.469, 0.656)
AD –51.31 12.8 (–51.406, –51.219)
BC 0.02 0.0 (–0.073, 0.114)a
BD 0.23 0.0 (0.136, 0.323)
CD 0.44 0.0 (0.344, 0.531)
ABC 0.02 0.0 (–0.073, 0.114)a
ABD –0.27 0.0 (–0.364, –0.177)
ACD 0.44 0.0 (0.344, 0.531)
BCD –0.02 0.0 (–0.114, 0.073)a
ABCD –0.02 0.0 (–0.114, 0.073)a


aNot significant.

EXERCISE

18.1 Table 18.11 lists measured CPU times for two processors on two workloads. Each experiment was repeated three times. Analyze the design.

TABLE 18.11 Data for 223 Experimental Design Exercise

Workload Processor A Processor B

I (41.16, 39.02, 42.56) (63.17, 59.25, 64.23)
J (51.50, 52.50, 50.50) (48.08, 48.98, 47.10)


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