Chemistry q test formula. Test your iq on chemistry 12 questions by thames last updated. What is dixons q test. There are several versions of dixons q test each of which calculates a value for q ij where i is the.
In statistics dixons q test or simply the q test is used for identification and rejection of outliersthis assumes normal distribution and per robert dean and wilfrid dixon and others this test should be used sparingly and never more than once in a data set. 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 dixons q test can be applied to the detection of multiple outliers.
The data excluding the possible outlier must be normally distributed use the kolmogorov smirnov test to check if data is normally distributed. This is a collection of ten chemistry test questions dealing with naming ionic compounds and predicting the chemical formula from the compound name. Science chemistry library chemical equilibrium factors that affect chemical equilibrium the reaction quotient q definition of reaction quotient q and how it is used to predict the direction of reaction.
The following table provides critical values for qa n where a is the probability of incorrectly rejecting the suspected outlier and n is the number of samples in the data set. 1658 questions all questions 5 questions 6 questions 7 questions 8 questions 9 questions 10 questions 11 questions 12 questions. Table of q critical values 90 confidence n qc 3 094 4 076 5 064 6 056 7 051 8 047 9 044 10 041.
Only one data point in a set may be rejected using the q test. Save as pdf page id 6642. The answers are at the end of the test.
Its commonly used in chemistry where data sets sometimes include one suspect observation thats much lower or much higher. Apr 11 2015 total attempts. Dixons q test or just the q test is a way to find outliers in very small normally distributed data sets.
This practice test deals with finding the molecular formula of chemical compounds. Note that the molecular mass or molecular weight is the total mass of a compound. Critical values for dixons q test last updated.
Naming ionic compounds is an important skill in chemistry. Honestly i am not a big fan of this statistical test but since dixons q test is still quite popular in certain scientific fields eg chemistry that it is important to understand its principles in order to draw your own conclusion of the presented research data that you might stumble upon in research articles or scientific talks.