1. Consider an experiment to compare the effect of using two different types of
ID: 277922 • Letter: 1
Question
1. Consider an experiment to compare the effect of using two different types of blood cells (red blood cells and white blood cells) and two different target proteins (albumins and enzymes) to repair clotting problems in laboratory mice.
a. What are the experimental units?
b. What is the response?
c. Give one factor in the experiment.
d. Give a second factor.
e. What are the treatments?
f. What may be some of the potential extraneous (noise) factors?
g. How can direct control be used so that these extraneous factors don't obscure the effects of the treatments on the response?
Explanation / Answer
a) The experimental units are red blood cells, white blood cells, albumins and enzymes.
b) The response is clotting of blood.
c) The factors in the experiment includes number of platelets, levels of calcium etc.
d) The second factor is calcium.
e) The treatments include infusion of fresh plasma containing proteins and enzymes required for clotting of blood.
f) The potential extraneous factors include temperature, pH etc.
g) The experiment should be done under room temperature in the presence of buffer to limit the influence of extraneous factors.
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