Respuesta :

JcAlmighty
The answer is because the results will be more accurate if there is a larger sample size. 

No matter what research is, the larger sample size is, the more accurately will be the results and vice versa. The larger samples increase a chance of significance because they reflect the population mean more reliably.
With small sample, the chance for false conclusions is higher.

Answer:

Mendel study such a large sample of pea plants because the more sample size gives more accurate results. Gregor Mendel performs his experiment on 29000 pea plants.  

He selected the pea plants they give many offspring and are able to reproduce quickly and are self fertilize. This makes his experiment easy to study and perform the experiment quickly.