Question

A crop scientist is conducting research with a drought resistant corn hybrid. She is interested in determining if increasing the spacing between these plants will increase yield. She prepares 30 single acre plots and randomly assigns 15 to have normal spacing while the other 15 are planted with an expanded spacing. The resulting average yield for each group of 15 plots was recorded.

Select one or more:

a. The explanatory variable is whether the corn plants had normal spacing or expanded spacing.

b. The response variable is the average yield for each group of 15 plots.

c. The explanatory variable is the average yield for each group of 15 plots.

d. The response variable is whether the corn plants had normal spacing or expanded spacing.

e. This study is best described as an experiment.

f. This is best described as an observational study.

Answer 1

Answer:

1.For this situation, obviously the analyst is controlling the manure given to corn plants. This implies this is a trial since specialist keep control in test on the autonomous variable.

Along these lines, choice E is right.

2.Autonomous or informative variable is whether the corn plant had compost or not on the grounds that scientist can control or deal with the measure of manure that is given to a solitary corn plants.

In this way, choice A is right answer

3.Subordinate variable or reaction variable is the yield recorded for each plot in light of the fact that the yield recorded in each plot is needy upon on whether the compost is given or not.

Along these lines, alternative B is additionally right

Hence we can say that,

alternative A, B and E are right answer