Question

I understand what the assignment is but im confused on question 2?

A biologist is interested in studying the effect of a birth defect inducing compound (compound X) in developing zebrafish. There are zebrafish embryos (hundreds) available in the biologist’s laboratory for use in the study. The experiment is to be conducted in a laboratory where 10 zebrafish embryos (2 hours postfertilization) are placed into Petri dishes in a controlled environment until 24 hours postfertilization. The biologist is planning to use 3 different birth defect-inducing chemical levels (high, medium and low concentrations). Birth defects can be measured by examining eye size and body length at 72 hours postfertilization.

1. List the treatments that the biologist plans to use in this experiment.

The biologist plans to use 10 zebrafish embryos that have been thorough 2 hours of postfertilization and later placed them into controlled environment petri dishes. This would help them get used to the 3 different  birth defect-inducing chemical levels (low, medium, high). The zebrafish embryos must stay inside the petri dishes for 24 hours of postfertilization.

2. Using the treatments listed in question 1, describe a completely randomized design.

3. Describe the control condition for this experiment and its purpose.

Answer 1

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