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Étudier une variable afin de caractériser une population à l'aide d'un échantillon issu de cette population.
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- Suppose that a population distribution is normally distributed with a mean and a standard deviation. Now, suppose that you draw an infinite number of random samples from this population with each sample consisting of 25 observations and you compute an infinite number of sample means. The standard deviation of the sample means (the standard error) is ____ as the population standard deviation
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