How can you mitigate to help prevent against history bias in a scientific study?

Specifically, a program that helps bring healthy a food to poor, crime filled area had much of its success from another program in the area which was already there helping to rebuild the neighborhood.

 

Prevention against history bias in a scientific study can be done by using random methods when selecting subgroups from populations. and ensuring that the subgroups selected are equivalent to the population at large in terms of their key characteristics, this method is less of a protection than the first, since typically the key characteristics are not known.

Step-by-step explanation

Therefore, one of the most effective methods that can be used by researchers to avoid sampling bias is simple random sampling, in which samples are chosen strictly by chance. The great thing about simple random sampling is that no effort is required by your potential participants.