Moderate# One Proportion $z$-Interval: Left-Handed Students

APSTAT-1UE7BE

A student at RHAM high school wondered what percent of the students in her school were left-handed. She randomly sampled $150$ students at her school and found $21$ of them to be left-handed.

Which of the following represents a $95\%$ confidence interval for the proportion of left-handed students at RHAM High School?