When the hypotheses being tested is one sided. That is to say, the hypothesis is not that the random variable X is different to some value V, but either that X > V or X < V. Of course, either hypothesis could include equality.
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a sample is a sample sized piece given... a sample size is the amount given in one sample
A representative sample is one where the statistics of the sample are the same as the statistics for the parent population.
the space used to show a sample promblem.
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