1876统计中等essayshort
Track-Record Age Bias 1
题目
As of end-2026, a database contains 45 surviving funds launched in 2024, 20 surviving funds launched in 2022, and 9 surviving funds launched in 2020. The corresponding survival rates were 90%, 50%, and 30%.
By how many years does the average age in the live panel understate the average age across all original launches?
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提交作答时记录，用于后续平均用时统计。
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