I could buy a flower seed packet from grocery outlet. I open the packet finding 6 sunflower seeds. 3 sunflower seeds in 3 pots of soil, and planting the other 3 sunflower seeds in 3 pots of sand. I also will water each plant every day and ensure each plant has the same amount of sunlight. Then I can measure the height of the sunflowers after one month.

Question

What are the treatments in your experiment?
The treatment would be the soil or sand the plants grow in.

What is the response variable in your experiment?

The response variable in my experiment is the amount of plant growth

Where in your experiment would random selection occur?
Random selection occurs when the plants are chosen (from the location you are getting your plants from).

Where in your experiment would random assignment occur?
Random assignment occurs when the plants are assigned to solid or sand.

Answer 1

Your experimental design is well-structured. Here's a summary based on your descriptions:

1. Treatments: The treatment in your experiment is the type of growing medium used for the sunflowers—specifically, the use of soil versus sand.

2. Response Variable: The response variable is the height of the sunflowers after one month, which serves as a measure of plant growth.

3. Random Selection: Random selection occurs when you choose the sunflower seeds from the seed packet. This step ensures that each seed has an equal chance of being chosen, which helps in generalizing the results to a larger population of sunflower seeds.

4. Random Assignment: Random assignment occurs when you assign the chosen sunflower seeds to either the pots of soil or the pots of sand. By randomly assigning the seeds to different treatments, you control for potential biases and variations among individual seeds, making your results more reliable.

This design allows you to investigate the effect of the type of growing medium on sunflower growth rigorously. Let me know if you need any more assistance with your experiment!