The efficiency ratio for a steel specimen immersed in aphosphating tank is the weight of the phosphate coatingdivided by the metal loss (both in mg/ft2). The articleStatistical Process Control of a Phosphate CoatingLine (Wire J. Intl., May 1997: 7881) gave theaccompanying data on tank temperature (x) and efficiencyratio (y).Temp. 170 172 173 174 174 175 176Ratio .84 1.31 1.42 1.03 1.07 1.08 1.04Temp. 177 180 180 180 180 180 181Ratio 1.80 1.45 1.60 1.61 2.13 2.15 .84Temp. 181 182 182 182 182 184 184Ratio 1.43 .90 1.81 1.94 2.68 1.49 2.52Temp. 185 186 188Ratio 3.00 1.87 3.08a. Construct stem-and-leaf displays of both temperatureand efficiency ratio, and comment on interestingfeatures.b. Is the value of efficiency ratio completely and uniquelydetermined by tank temperature? Explain your reasoning.c. Construct a scatterplot of the data. Does it appearthat efficiency ratio could be very well predicted bythe value of temperature? Explain your reasoning
Getting Started with SAS Programming In this class you will learn: statistical programming in SAS to write SAS programs using SAS language good programming style general layout of SAS on Windows reading data into SAS o in-stream o external data o list input o column input o mixed input o formatted data temporary vs. permanent datasets concatenating datasets merging datasets There is also a GUI front-end to SAS called SAS Enterprise Guide You have more flexibility writing programs
