Question: What is the sigma (with 1.5σ shift) when there are 69% defective?
Schema: create table table_222448_1 (sigma__with_15σ_shift_ varchar, percent_defective varchar, PRIMARY KEY (sigma__with_15σ_shift_))
SQL: select sigma__with_15σ_shift_ from table_222448_1 where percent_defective = "69%"