chemistry

Dixon' Q test calculator Dixon's Q-test Calculator - Detection of a single outlier   Dixon’s test (or the Q-test ) has been described in a previous post entitled “ Detection of a Single Outlier|Statistical Analysis|Quantitative Data ”. The test is popular because the calculations involved are simple. A solved example is given in the above post. Are there any limitations to Dixon’s Q-test? The data excluding  the possible outlier must be normally distributed (use the Kolmogorov-Smirnov test to check if data is normally distributed ) The Q-test is valid for the detection of a single outlier (it cannot be used for a second time on the same set of data). Other forms of Dixon’s Q-test can be applied to the detection of multiple outliers. The Q-test should be applied with caution – the same applies to all statistical tests used for rejecting data - since there is a probability, equal to the significance level a (a =...

Cubic equation calculator - Weak Acids and bases Home > Weak Acids and Bases – Calculate the pH of a weak acid (a general equation) > Solving Weak Acid and Weak Base pH problems > Weak Acid Weak Base pH calculation solved example > Weak Acid Weak Base pH calculation solved example > Cubic Equation Calculator for Weak Acid-Base Equilibria   Cubic Equation Calculator for Weak Acid-Base Equilibria The mathematical (algebraic) exact method for solving weak acid or weak base equilibrium problems has traditionally been less popular than the alternative approximate method, probably because of the inconveniences related to solving cubic equations. However, modern mathematics software or even spreadsheets like Excel 2010 handle such equations with ease, making the algebraic method more attractive than in the past. The mathematical approach to solving weak acid-base equilibria has been presented in...