Jason tried a new fertilizer called MegaGro on his garden He

Jason tried a new fertilizer called MegaGro on his garden. He said, \"l used it on all my tomato plants this year, and they grew much better than last year! MegaGro is fantastic!\" VJas Jasons test of MegaGro scientifically valid? Why or why not?

Solution

Randomized controlled trials (RCT) are conducted to determine the existence of cause-effect relation between the applied treatment and outcome. In this, the subjects will be randomly given the test compound or any other intervention, which can be a standard or control. Control groups do not receive the treatment, they may be will be given placebo or no intervention at all.

In the given case, Jason applied the fertilizer to all of the plants, means, there are no control plants to compare the results of plants that receive the fertilizer. Without control group, the results are not scientifically valid because we can only present the results, but cannot compare (indicates significance).