fixed typo

MTUS-W6-adult-survey-data-processing.Rmd

@@ -410,7 +410,7 @@ The following analyses use a subset of the main data which only contains 1983 &
 ```{r testDifferences1983_1985}
 kable(caption="Cases for 1983/87 pooling testing",
       table(subset1983_1987_DT$survey,
-            subset1983_1987_DT$ba_survey,
+            subset1983_1987_DT$sex,
             useNA = "always"
       )
       )