Mathematics, 21.11.2020 05:50 emmamanny

A farmer would like to determine if a new liquid fertilizer is an improvement compared with the fertilizer currently used. To collect data, two methods are considered. Method 1: Visit a local farm currently using the new liquid fertilizer and measure the heights of plants grown at the farm.

Method 2: Choose a plot of land and divide it into 16 smaller plots. Randomly select 8 of the plots to use the new fertilizer and 8 of the plots to use the current fertilizer. Measure and compare plant heights in the 16 plots.

Which statement about these methods is true?

Method 1 is an experiment because the farm uses the new fertilizer.
Method 2 is an experiment because there are 16 different plots used.
Methods 1 and 2 are both experiments because both use the new fertilizer.
Method 2 is an experiment because the plots are randomly assigned a fertilizer.

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