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 average yield for each group of 10 plots was recorded.

Select all that apply.

Choose at least one answer.

1 This study is best described as an experiment.

2 The response variable is whether the corn plants had fertilizer X or not.

3 The explanatory variable is whether the corn plants had fertilizer X or not.

4 This is best described as an observational study.

5 The response variable is the average yield for each group of 10 plots.

6 The explanatory variable is the average yield for each group of 10 plots.

1 This study is best described as an experiment.

5 The response variable is the average yield for each group of 10 plots.

Step-by-step explanation:

1) This study is best described as an experiment.

This is true. This experiment indicates that study of the crops with or without fertilizers

2) The response variable is whether the corn plants had fertilizer X or not.

No the response variable is the yield

3) The explanatory variable is whether the corn plants had fertilizer X or not.

Sort of The explanatory variable is the fertilizer the levels would be whether or not it had the fertilizer

4) This is best described as an observational study.

No because they had an influence of using a particular fertilizer and a particular plot of land

5) The response variable is the average yield for each group of 10 plots.

Here we are using the fertilizers in order to increasing the yield of the crops So it clearly shows that growth of the corn hybrid depends upon the fertilizers (dependent or response variable)

6) The explanatory variable is the average yield for each group of 10 plots.

No the explanatory variable is the fertilizer