Statistics

# Statistics - Parameter fixed unknown number that describes...

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Parameter fixed, unknown number that describes the population Statistic known value calculated from a sample/a statistic is often used to estimate a parameter Variability different samples from the same population may yield different values of the sample statistic Sampling Distribution tells what values a statistic takes and how often it takes those values in repeated sampling THE LAWOF LARGE NUMBERS - Consider sampling at random from a population with true mean µ . As the number of (independent) observations sampled increases, the mean of the sample gets closer and closer to the true mean of the population. (gets closer to µ ) The Sampling Distribution of a statistic is the distribution of values taken by the statistic in all possible samples of the same size ( n ) from the same population MEAN AND STANDARD DEVIATION OF SAMPLE MEANS - If numerous samples of size n are taken from a population with mean µ and standard deviation σ , then the mean of the sampling distribution of is µ

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## This note was uploaded on 08/30/2011 for the course MA 116 taught by Professor Muntheralraban during the Summer '11 term at Montgomery CC.

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Statistics - Parameter fixed unknown number that describes...

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