Typographic errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors that result in a real but incorrect word. Spell-checking software will catch nonword errors but not word errors. Human proofreaders catch 70% of word errors. You ask a fellow student to proofread an essay in which you have deliberately made10word errors. What is the smallest number of missesmwithP(Xm)

no larger than 0.05? You might considermor more misses as evidence that a proofreader actually catches fewer than 70% of word errors.

How many misses?