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Chapter 3

# Chapter 3 - STAT 410/510 F-2011 Chap 3 Diagnostics and...

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STAT 410/510 F-2011 1 Chap. 3 Diagnostics and Remedial Measures 3.1 Diagnostics for predictor variable data Toluca1; set Toluca; run+ 1 ; proc chart data =Toluca1; vbar lotsize/ levels = 11 ; * histogram or dot plot; proc gplot ; symbol1 value =dot interpol =join; plot lotsize*run; * sequence (run) plot; proc univariate plot normal ; * stem-and-leaf plot and box plot; var lotsize; run ; Figure 1. Dot plot and Sequence plot Stem plot and Box plot: Stem Leaf # Boxplot 12 0 1 | 11 00 2 | 10 00 2 | 9 0000 4 +-----+ 8 000 3 | | 7 000 3 *--+--* 6 0 1 | | 5 000 3 +-----+ 4 00 2 | 3 000 3 | 2 0 1 | ----+----+----+----+ Multiply Stem.Leaf by 10**+1 l o t s i z e 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 1 2 0 r u n 0 1 0 2 0 3 0

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