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  • El Salvador hospitals overwhelmed by respiratory diseases
    SAN SALVADOR, El Salvador (AFP) -- Hospitals in El Salvador have been overwhelmed by an unexpected rise in respiratory diseases including pneumonia and dengue fever, health authorities said on Wednesday. The official said acute respiratory disease has shot up, totaling some 1.3 million cases.
SAMPLE vs POPULATION MEAN PDF Print E-mail
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FREE LESSONS at Avalon Medical Laboratory ONLINE - STATISTICS
Friday, 11 September 2009 19:19

 

 

In statistics, a sample is a subset of a population. Typically, the population is very large, making a census or a complete enumeration of all the values in the population impractical or impossible. The sample represents a subset of manageable size. Samples are collected and statistics are calculated from the samples so that one can make inferences or extrapolations from the sample to the population.

 

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MEAN: The expected value of a random variable. The standard average.