Fatimah wants to build a one-sample z interval to


estimate the proportion of students at her school who ate


breakfast every day last week with 90% confidence. She


takes a random sample of 75 students and finds that 20


ate breakfast every day last week.


What critical value z* should Fatimah use to construct


this confidence interval?


A) z* = 1.282


B) z* = 1.645


C) z* = 1.96


D) z* = 2.576