An experiment was conducted to test the effects of a high-protein diet on the ability of chickens to lay eggs that have a high-protein content. ten chickens were obtained from three chicken-breeding farms (all were hens), and their diet consisted of a mixture of fish, cheese, and soybeans. eggs produced from this group of chickens were found to have a slightly higher protein content than eggs purchased at a local grocery store. from this, the investigator concluded that the diet fed to the chickens was responsible for the protein increase in the eggs. how would you analyze these results, using critical thinking?