College Biology Quiz
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A researcher conducts an experiment to test whether a new fertilizer increases plant growth. She randomly assigns 40 plants to two groups: 20 receive the new fertilizer and 20 receive standard fertilizer. After 30 days, she measures plant height and finds that plants with new fertilizer have a mean height of 25.3 cm (standard deviation = 3.1 cm) while plants with standard fertilizer have a mean height of 22.8 cm (standard deviation = 2.9 cm). The p-value for this comparison is 0.02. What is the most appropriate interpretation of these results?
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