CREATE TABLE table_2575 ("Sigma level" FLOAT, "Sigma  ( with 1.5\\u03c3 shift ) " TEXT, "DPMO" TEXT, "Percent defective" TEXT, "Percentage yield" TEXT, "Short-term C pk" TEXT, "Long-term C pk" TEXT)

When sigma (with 1.5 shift) is 2.5, what percent is defective?
SELECT "Percent defective" FROM table_2575 WHERE "Sigma (with 1.5\u03c3 shift)" = '2.5'
SELECT "Percent defective" FROM "table_2575" WHERE "Sigma (with 1.5\u03c3 shift)" = '2.5'