If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

# Conditions for a z interval for a proportion

AP.STATS: UNC‑4 (EU), UNC‑4.B (LO), UNC‑4.B.1 (EK), UNC‑4.B.2 (EK)

## Problem

A development expert wants to use a one-sample z interval to estimate the proportion of women aged 16 and over that are literate in Albania. They take an
SRS
of 50 women from this population and finds that 48 are literate.
Which conditions for constructing this confidence interval did their sample meet?