conducting experiment without control set up is meaningless Give reason why?? Please answer
Answers
Answer:
For example - you have a new pill that you think cures the common cold. You find 100 people who have colds - and you randomly give half of them your new wonder drug - and the other half a sugar pill. The second half are the “controls”.
Then you watch them all and figure out who feels better quicker.
If those are split more or less evenly between the two groups - then your pill doesn’t work. If the group who got the wonder drug get better much faster than the control group - then you’re on to something…and if they do worse than the control group…well, maybe you’re in the wrong field!
The point here is that if you just gave all 100 people the wonder drug - you wouldn’t know whether they got better because of the drug - or because the weather changed or because they all *believed* the drug would work and therefore mis-reported their symptoms.
This applies to all sorts of testing…not just medicines…not just people.
If you want to find out whether some new kind of paint prevents iron from rusting better than the old paint - you take a bunch of strips painted with the new paint and a bunch with the old paint - and you stick them outside for a few years - then examine them to see which ones did the best. The group with the old paint on them are “the control group”.
Explanation:
Hope it helps you....
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