2026年9月国际C卷练习 · 第 14 题

2026年9月国际C卷练习 · 原库模块 2 · Q14 参考答案

Four different research groups each surveyed a random sample of students from a certain high school to estimate the percentage of students at the school who speak a second language. The table shows the resulting estimates and their associated margins of error.

Assuming the margins of error were calculated in the same way, which group had the largest sample size?