Question

statistically significant results are more likely to be obtained from experiments that: were interpreted by \eye - balling\ the data and looking for obvious differences between the groups. have a small sample size. have all subjects in the experimental group. have a large experimental group and a small control group. have a large sample size in both groups.

Explanation:

Larger sample sizes reduce sampling error and increase the power of a statistical test, making it more likely to detect true differences and obtain statistically significant results. "Eye - balling" data is subjective, small sample sizes increase error, having only experimental subjects or an unbalanced group size (large experimental and small control) is not ideal for valid results.

Answer:

E. have a large sample size in both groups.