位置37的问题 A portion of the population selected to represent the population is called _____.descriptive statisticsa censusstatistical inferencea sample

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The question asks: 'A portion of the population selected to represent the population is called _____.' This is a standard definition in statistics and research sampling.
Option 1: descriptive statistics. This refers to numerical summaries of the data from a sample or population (like mean, median, standard deviation), not to the actual subset chosen to represent the population. So this choice is incorrect as a definition of the subset.
Option 2: a census. A census is the complete enumeration of the entire population, not just a part of it. Since the question specifies a portion, a census does not fit this description. This makes it an incorrect option.
Option 3: statistical inference. Statistical inference is the process or set of methods used to draw conclusions about a population from sample data. It is about what we do with the sample after collecting it, not the name of the sample itself. Therefore this choice mislabels the concept.
Option 4: a sample. A sample is indeed a subset of individuals drawn from the population to represent it in analysis, allowing conclusions about the population with certain uncertainty. This matches the definition given in the question.

位置37的问题 A portion of the population selected to represent the population is called _____.descriptive statisticsa censusstatistical inferencea sample

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