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# Chapter 5: Making Controlled Comparisons
library(poliscidata) # Loads R companion package in session
# CROSS-TABULATION ANALYSIS WITH A CONTROL VARIABLE
# Starting point, cross-tabulation without control variable
# This xtp command will generate a mosiac plot
cat("Basic Cross-Tabulation:\n")
xtp(gss, grass, attend3, wtss)
# Now we introduce control variable: kids
cat("\n\nCross-Tabulation with Control Variable:\n")
xtabC(~grass + attend3 + kids, gssD)
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