. An article shows data to compare several methods for predicting the shear strength for steel plate girders. Data for two of these methods, the Karlsruhe and Lehigh procedures, when applied nine times to a girder, are shown in the following table. We wish to determine whether there is any difference between the two methods. Assume the same standard deviations. (Note that we will perform unpaired comparison. We do not perform a paired test.) Karlsruhe Method Lehigh Method 1.180113834 1181689539 1.2608 Ir216854 1229723725 1184604647 1188 932343 1208227716 1158878826 1194871397 1176730925 1.14117936 1.08556826 1201950977 1153560694 1174993939 1141493512 1214994375 1111054563 1.1. (2 points) Draw the normal probability plots for two samples using Microsoft Excel Data Analysis Toolpak. What are their R-sq uared