One-Sample T-Test in Chemical Analysis – Statistical Treatment of Analytical Data
Statistical Treatment of Analytical Data - One-Sample t-test Home > Statistics – Frequency Distributions, Normal Distribution, z-scores > Statistics – Frequency Distributions, Normal Distribution, z-scores Statistical Treatment of Analytical Data - One-Sample t-test in Chemical Analysis A one-sample t-test is used to compare two means provided that data are normally distributed (plot of the frequencies of data is a histogram of normal distribution ). A t-test is a parametric test and relies on distributional assumptions. It is a useful tool in analytical work when two means have to be compared. A situation like this is presented in the following example. A new analytical instrument is tested in a chemical laboratory by determining the mass m (in mg) of Cu contained in a certain mass (i.e. 1 g) of a certified reference material (CRM). The analysis certificate of the CRM states that the average mass of Cu (in mg) is 4.54 per...