Statistics Notation - Statistics Notation This appendix...

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Statistics Notation This appendix describes how symbols are used on the Stat Trek web site  to represent numbers,  variables parameters statistics , etc. Capitalization In general, capital letters refer to population attributes (i.e., parameters);  and lower-case letters refer to sample attributes (i.e., statistics). For  example, P  refers to a population proportion; and  p , to a sample proportion. X  refers to a set of population elements; and  x , to a set of sample  elements. N  refers to population size; and  n , to sample size. Greek vs. Roman Letters Like capital letters, Greek letters refer to population attributes. Their sample  counterparts, however, are usually Roman letters. For example, μ refers to a population mean; and  x , to a sample mean.  refers to the standard deviation of a population; and  σ s , to the  standard deviation of a sample. Population Parameters By convention, specific symbols represent certain population parameters.  For example, μ refers to a population mean.  refers to the standard deviation of a population. σ σ 2  refers to the variance of a population. P  refers to the proportion of population  elements  that have a  particular attribute. Q  refers to the proportion of population elements that  do not  have a  particular attribute, so  Q  = 1 -  P .
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 is the population correlation coefficient, based on all of the ρ   elements from a population. N  is the number of elements in a population. Sample Statistics By convention, specific symbols represent certain sample statistics. For  example, x refers to a sample mean. s  refers to the standard deviation of a sample. s
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This note was uploaded on 05/02/2011 for the course MGMT 3003 taught by Professor Anderson during the Fall '10 term at The University of Texas at San Antonio- San Antonio.

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Statistics Notation - Statistics Notation This appendix...

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