Ononot — An investigator is testing the effectiveness of two differen

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Inferential Statisticsmedium

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An investigator is testing the effectiveness of two different fertilizers. They calculate a $95\%$ confidence interval for the difference in mean plant height as $(-2.4, 6.8)$ cm. Based on this, what can be concluded about the difference in means at the $\alpha = 0.05$ significance level?