EXPERIMENTS: The Good, the Bad, and the Ugly 1. I grow two tomato plants from se

Question

EXPERIMENTS: The Good, the Bad, and the Ugly 1. I grow two tomato plants from seed in separate pots next to each other on my porch. I use the same potting soil in each pot and water both at the same time each day. To one pot I add a small amount of Miracle-Gro, while I add no extra fertilizer to the other At the end of 6 weeks, the Miracle-Gro plant has increased in weight by 210%, while the other plant has increased by only 65%. Fill in the following table. Is there a control treatment (and, if so, what is it)? Is there any accounting for individual variation? Is there repetition in the experiment? What, if any, confounding variables are not addressed in the experiment? Can we say with confidence that Miracle-Gro aids in plant growth?

Explanation / Answer

Here in this experiment 2 sets of data are present on pool the Miracle - Gro is administered which is the experimental condition. Whereas, on the other pool there is no addition of fertilizer so this is the control group. So no other control is required for this set up.

Yes for a more precise result and interestingly to get more information on the effect of the Miracle grow individual data in enach plant is necessary. So that it can be derived whether any other factor is playing any role in this growth other than the Miracle Gro.

Yes ofcourse. No experiment should be concluded by performing just once. It should be repeated atleast thrice and then the average data should br consedered as the outcome of the experiment.

thre may be a number of variables in this experiment which are not mentioned. Like the health of the indivudual plant, like the height, age, no of fruits present during the beginning of the experiment. All these data should be incorporated.

Not from one experiment it can be said with confidence. After repeating it thrice only it can be confirmed.

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