Researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. This method of gathering data is classified as
a census.
a sample survey.
an experiment.
an observational study.

An observational study can also be called a comparative analysis, it involves carrying out a study between two groups and comparatively analyzing their outputs.

In summary, the two cows will be compared for both differences and similarities.

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Researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. This method of gathering data is classified as a census. a sample survey. an experiment. an observational study.

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What is an observational study?

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Researchers compare the body composition of cattle feeding on a grain diet with that of cattle feeding on a grass diet. This method of gathering data is classified as
a census.
a sample survey.
an experiment.
an observational study.