The farmer's experiment was widely considered to be well-designed and well-implemented. After 8 weeks, he found no difference between groups, and the berry harvest was still lower than in previous years. What can he conclude about his hypothesis? Rodents are eating the berries. Birds are eating the berries. Birds are not eating the berries. The results do not address the hypothesis.
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Answer

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Step 1
: Analyze the experimental results and the hypothesis

The farmer conducted an experiment to test the hypothesis that birds are eating the berries. However, after 8 weeks, he found no difference between the groups, and the berry harvest was still lower than in previous years.

Step 2
: Evaluate the relevance of the experimental results to the hypothesis

Since the experiment did not show a difference between the groups, it suggests that any potential bird-eating activity did not have a significant impact on the berry harvest.

Final Answer

The farmer cannot conclude that birds are eating the berries, and alternative explanations should be explored.