# Tag Archives: probability

## One-Tailed vs. Two-Tailed Significance Tests

Example showing (a) a two-tailed, and (b and c) a one-tailed, significance test of an sample’s experimental mean relative to the population’s true mean. The normal distribution curves are drawn using the sample’s mean and standard deviation. For α = 0.05, the … Continue reading

## Central Limit Theorem

According to the central limit theorem, when an analysis is subject to a variety of indeterminate errors, the distribution of results for that analysis will approximate a normal distribution. As the number of sources of indeterminate error increases, the results … Continue reading

## Normal Distribution

A binomial distribution describes a population whose members have only certain, discrete values. This is the case with the number of 13C atoms in cholesterol. A molecule of cholesterol, for example, can have two 13C atoms, but it can not … Continue reading

## Binomial Distribution

A binomial distribution describes a population whose members take on only certain, discrete values. This is the case, for example, with the number of 13C atoms in cholesterol because a molecule of cholesterol can have two 13C atoms, but it … Continue reading