Data containing the length and breadth measurements of jellyfish was used to fit

Question

Data containing the length and breadth measurements of jellyfish was used to fit a linear model for the breadth of the jelly fish. Measurements were taken from jellyfish at two sampling sites. (Site 1 = 1, Site 2-2) ,ni at site i = 1 2. and let xij denote the associated length. Our model for the jellyfish Let Y j denote the jellyfish breadth for jellyfish,-1 , breadth is then: where {Eiji 1-1 ,2;,-1 , ,n) is a set of independent N(0,02) random variables. Residuals vs. Fitted Values Site Site 1 Site 2 -2 12 15 18 Fitted Values

Explanation / Answer

Based on the above the below assumption appears to be voilated :

The assumption that the scale of the variability of the errors is the same in both groups. (Since the plot is completely scattered)

What can we do to address this:

Transform the response for example by taking the logarithm.

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