A reasonably linear pattern. And a boxplot indicates that the distribution is quite symmetric in the middle 50% of the data and only mildly skewed overall. It is therefore reasonable to estimate and predict using t intervals. 4.7 5.1 5.2 5.3 5.6 5.8 6.3 6.7 7.2 7.4 7.7 8.5 8.9 9.3 10.1 11.2 a. Estimate the true average crack initiation depth with a 99% CI and interpret the resulting interval. b. Predict the value of a single crack initiation depth by constructing a 99% PI. c. Interpret in context the meaning of 99% in (