An investigator conducts an experiment with four treatment groups. The response

Question

An investigator conducts an experiment with four treatment groups. The response variable is growth of a plant during the experiment. She performs an F-test. What is the alternative hypothesis the researcher is testing with the F-test? Choose the correct answer below. O A. At least one treatment group has a different average growth of plants during the experiment, but not all four necessarily have different mean growths O B. All four treatment groups have the same average growth of the plants during the experiment. ° C. All plants in all treatment groups have the same growth during the experiment. D. O E. All four treatment groups have a different average growth of plants during the experiment.

Explanation / Answer

We have

The performing the F-test the hypothesis is

Null hypothesis:

Ho: All four treatment groups have the same average growth of plant during the experiment.

Vs

Alternative hypothesis:

H1: At least one treatment group has a different average growth of plants during the experiment , but not all four have different mean growth.

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