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Estimating Methods, Variability, and Sampling for Drop-Test Data

Variability (Continued)

Graphical Results

Figure 15 illustrates some differences within the replicates. The scatterplots show gpc levels by row, presenting a horizontal profile of the drop. Drops 201 and 202 are fairly similar. They have two distinct peaks, tapering off on either end. The line length charts indicate similar line lengths except for 2 and 8 gpc.

Figure 15—Comparison of line lengths at different
gpc levels for drops 201 and 202.

The scatterplots for drops 203 and 204 (figure 16) are not quite as similar as the scatterplots for drops 201 and 202, but the line length chart for drop 203 is similar to that for 204, except for 2 gpc.

Figure 16—Comparison of line lengths at different
gpc levels for drops 203 and 204.

Figure 17 shows similar profiles for drops 205 and 206. Drop 205 has more points at coverage levels higher than 4 gpc. The line lengths are similar with discrepancies increasing as the gpc values increase.

Figure 17—Comparison of line lengths at different
gpc levels for drops 205 and 206.

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