Researchers in the Krug Lab at CSULA are interested in understanding why some mussels off the coast of Los Angeles seem to grow in some areas of the beach but not in others. In particular, researchers noticed that some mussels (Mytilus californianus) seemed to grow near the rocks (at low tide) and other mussels (Mytilus trossulus) grow in deeper waters. Are the Mytilus californianus mussels incapable of growing when submerged in deep waters? Furthermore, the Mytilus californianus seem to be bigger than the Mytilus trossulus. Are M. californianus more aggressive and pushing the other species out of shallower areas?.
What will be your TREATMENT GROUP?
How many REPLICATES will put in each group? Justify your decision.

The treatments will be the group of mussels Mytilus californianus placed in an environment similar to low tide and the group of mussels Mytilus californianus placed in environments similar to high tide. As well as the group formed by Mytilus trossulus mussels placed in an environment similar to low tide and the group of Mytilus trossulus mussels placed in an environment similar to high tide.

The number of replicates in each group must be at least 64 for each treatment.

Explanation:

In an experiment, treatments are the groups of elements that will be tested. As in the above experiment, two groups of different mussels will be investigated in two different environments, we will need one group of each mussel in each environment, so there will be 4 treatments.

In addition, it is necessary to know the number of replicates that the treatment must have, which allows a reasonable number of degrees of freedom to be obtained at the time of the statistical analysis. To know the minimum number of replicates you should consider the expression n^3, where "n" represents the number of treatments. In this case, the expression will represent 4^3 which will give a total of 64 replicates.

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