A Study Examined the Effectiveness of Botox Injections in the Corrugator

Multiple Choice

A study examined the effectiveness of Botox injections in the corrugator supercilii muscles for the treatment of chronic migraines. Of the 29 migraine-prone patients participating in the study, 16 reported complete migraine elimination. How large a sample n would you need to estimate p with margin of error 0.02 with 90% confidence? Use the guess p* = 0.50 as the value for p.

A) n = 846
B) n = 1678
C) n = 1692
D) n = 2401