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The horticulturist decides to take more measurements in order to get a more accurate estimate. If the horticulturist wants to be able to create a

The horticulturist decides to take more measurements in order to get a more accurate estimate. If the horticulturist wants to be able to create a 90% confidence interval for the mean daily rainfall with a margin of error equal to +/- 0.2 mm. how large should the sample be?

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