Distinguish a Surviving Sample from a Population - Practice 2

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A proportion in surviving records describes that record set. It does not automatically estimate all people or all events when survival is selective. These fictional archives count records, not unique people, unless stated otherwise.

Worked example

If 30 of 50 surviving letters mention rain, 60% of those letters mention it. That is not proof it rained on 60% of all days.

Three schematic surviving documents accompany a warning that archives can be selected sets. Missing evidence does not by itself prove an event never happened or a perspective never existed.

Question 1 Fictional archive 6 has 100 surviving letters; 20 mention a harvest. What percent of this surviving set mention it? Answer

Question 2 Fictional archive 7 has 110 surviving letters; 33 mention a harvest. What percent of this surviving set mention it? Answer

Question 3 Fictional archive 8 has 120 surviving letters; 48 mention a harvest. What percent of this surviving set mention it? Answer

Question 4 Fictional archive 9 has 130 surviving letters; 65 mention a harvest. What percent of this surviving set mention it? Answer

Question 5 Fictional archive 10 has 140 surviving letters; 84 mention a harvest. What percent of this surviving set mention it? Answer