1923统计中等数值题medium
Required Observation Count 3
题目
A research lead uses the approximation n >= K * sigma^2 / delta^2 with K = 9, signal standard deviation 30 bp, and target detectable mean shift 4 bp. What is the minimum integer sample size?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
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