Statistical Syntax |
Variables are represented by a letter, usually upper case.
A letter with a bar over the top refers to the arithmetic mean of that variable
s refers to the standard deviation of a population, s^{2} refers to the variance of a population
s refers to the standard deviation of a sample, s^{2} refers to the variance of a sample
X_{i} refers to a datum point in variable X, in the i^{th} position
S means sum the following values
SX^{2} means square the numbers in variable, X, then sum them
(SX)^{2} means sum the numbers in variable X, then square the result
f usually refers to frequency counts within a variable
p(A) is the probability of event A
p(A u B) is a union; the probability of event A or B occurring
p(A n B) is an intersection; the probability of event A and B occurring
p(A|B) is a conditional probability, the probability that A will occur given that B has already occurred
nCx refers to combination math
nPx refers to permutation math
An ! after a character means factorial (ie n! = n * (n -1 ) * (n - 2) * ....*1)
z is a standardized score, measured in standard deviation away from a population mean