Why Is Sample Size Important

Why is sample size important?

A) Statistical significance is best achieved with a small sample size.
B) Larger sample size increases the likelihood that the results of a study are not due to random chance.
C) Relationships between variables can be determined only using a large sample size.
D) Researchers will always draw the right conclusions about a set of data if the sample size is large enough.
E) Legitimate scientific studies can be performed using only a large sample size.