Refer to the Journal of Graphic Engineering and Design (Vol. 3, 2012) study of the quality of flexography printing, Exercise 9.24 (p. 520). Recall that four different exposure times were studied-8, 10, 12, and 14 minutes-and that the measure of print quality used was dot area (hundreds of dots per square millimeter). Tukey's multiple comparisons procedure (at an experiment wise error rate of .05) was used to rank the mean dot areas of the four exposure times. The results are summarized below. Which exposure time yields the highest mean dot area? Lowest?

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Mean Dot Area: Exposure Time: (minutes) .571 .594 .588 14 8 .582 12 10 10