Question

There is no chart to go with this so please don't delete my question

Jackson is testing different types of planting soil to determine which type is most effective for growing strawberry bushes. He purchases two different brands of planting soil from a local store. Jackson applies brand A to an area of the yard that receives full sunlight and brand B to another area of the yard that is in partial sunlight. He waters the area with brand B daily; he waters the area with brand A every other day. At the end of the study, Jackson concludes brand A is more effective in growing blueberry bushes. Is Jackson's conclusion valid? Explain why or why not.

Answer 1

No. Jackson failed to account for possible alternate explanations.

Explanation:

Both the watering schedule and the amount of sunlight may be contributors to the result Jackson observed. Without some way to control for these factors, the experiment is inconclusive regarding the contribution to the results that is made by the planting soil.