ASPHALT BINDERS AND ASPHALT MIXTURES - Materials for Civil and Construction Engineers - page 392

Table P9.40

Core No. Density (pcf) Core No. Density (pcf)

1 148.3 11 147.8

2 147.8 12 148.1

3 148.2 13 147.3

4 148.7 14 147.7

5 148.2 15 147.3

6 147.7 16 147.0

7 148.4 17 147.1

8 147.8 18 146.7

9 147.7 19 146.9

10 148.6 20 146.8

a. Using a spreadsheet program, create a control chart for these data
showing the target value and the upper and lower specification
limits. Are the density data within the specification limits?
b. Comment on any trend and possible reasons.

9.14

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