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Martin V
Joined Sep 2023 · He/Him · 6:40 AM Local
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The question asks for the actual number of females, not the proportions (percentages). So firstly, you get the proportions of females with mercury > 145mm, 2.35% + 0.15% = 2.5%. Then, multiply this by the sample size (400) and get the exact count of females which is 2.5% * 400 = 10 females. There you have it!
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