Since the length of the sample is small the variance is big, so the numbers obtained for the conclusion are noisy, (random effect has a big impact). Sea refer

Since the length of the sample is small the variance is big, so the numbers obtained for the conclusion are noisy, (random effect has a big impact). Sea reference hear for some comments are the law of small numbers, the most dangerous equations and the like http://news.ycombinator.com/item?id=4893258 http://news.ycombinator.com/item?id=4893258