Online worksheet ยท 2 of 4
A sample must match the question - Online practice 2
Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.
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Invented survey: four equal 1-square-metre quadrats were chosen by random coordinates before any plants were counted. Counts: 1, 3, 5, 7. The study area is 20 square metres. Estimate density by the sample mean; multiplying it by area assumes the sample represents the area. No real outdoor collecting is required.
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