Statistics
- Greek letters (e.g. θ, β) are commonly used to denote unknown parameters (population parameters).
- An estimate of a parameter is often denoted by placing a caret over the corresponding symbol, e.g., pronounced "theta hat".
- Some commonly used symbols for sample statistics are given below:
- the sample mean ,
- the sample variance s2,
- the sample correlation coefficient r,
- the sample cumulants kr.
- Some commonly used symbols for population parameters are given below:
- the population mean μ,
- the population variance σ2,
- the population correlation ρ,
- the population cumulants κr.
- The arithmetic mean of a set of numbers x1, x2, ..., xn is denoted by, pronounced "x bar".
Read more about this topic: Notation In Probability And Statistics
Famous quotes containing the word statistics:
“O for a man who is a man, and, as my neighbor says, has a bone in his back which you cannot pass your hand through! Our statistics are at fault: the population has been returned too large. How many men are there to a square thousand miles in this country? Hardly one.”
—Henry David Thoreau (1817–1862)
“We already have the statistics for the future: the growth percentages of pollution, overpopulation, desertification. The future is already in place.”
—Günther Grass (b. 1927)
“Maybe a nation that consumes as much booze and dope as we do and has our kind of divorce statistics should pipe down about “character issues.” Either that or just go ahead and determine the presidency with three-legged races and pie-eating contests. It would make better TV.”
—P.J. (Patrick Jake)