Question

A crop scientist is conducting research with a drought resistant corn hybrid. She is interested in determining if using fertilizer X will increase yield. She prepares 20 single acre plots and randomly assigns 10 to have normal soil while the other 10 are planted with fertilizer X. The resulting yield for each plot was recorded. Select one or more: The explanatory variable is the yield for each plot. The explanatory variable is whether the corn plants had fertilizer X or not The response variable is whether the corn plants had fertilizer X or not. This is best described as an observational study. This study is best described as an experiment. The response variable is the yield for each plot.

Answer 1

Answer

In this case, it is clear that the researcher is controlling the fertilizer given to corn plants. This means that this is an experiment because researcher keep control in experiment on the independent variable.

So, option E is correct.

Independent or explanatory variable is whether the corn plant had fertilizer or not because researcher can control or manage the amount of fertilizer that is given to a single corn plants.

So, option B is correct answer

Dependent variable or response variable is the yield recorded for each plot because the yield recorded in each plot is dependent upon on whether the fertilizer is provided or not.

So, option F is also correct

Final answer

option E, B and F are correct answer