A plant scientist wants to study yield of a new variety of wheat She has...
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A plant scientist wants to study yield of a new variety of wheat She has 100 plots of land and applied various quantities of nitrogen fertilizer and water and measured wheat production on each plot Consider these statements about this study i Amount of wheat produced is a response variable ii This is an observational study iii amount of nitrogen fertilizer applied is an explanatory variable Which of the statements are true correct ii is correct i and iii are incorrect i ii and iii are all correct i and iii are correct ii is incorrect i and ii are correct iii is incorrect ii and iii are correct i is incorrect i is correct ii and ii are incorrect
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