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ZX-3F3D4CA80C2025年12月国际A卷 · 第 5 题
2025年12月国际A卷 · 原库模块 2 · Q5 原库参考解析
A researcher is designing a study to investigate the average number of hours students at a high school spend reading per day. The researcher will report an estimated average number of hours students at the high school spend reading per day with an associated margin of error. The researcher is considering using a random sample of either 90 or 180 students from the high school. Which of the following would be the most likely effect of using the larger random sample compared to the smaller random sample?
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