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25 May, 10:12

Government data show that 9% of the American population are at least 75 years of age. To test a random-digit dialing device, you use the device to call randomly chosen residential telephones in your county. Of the 290 members of the households contacted, 3% are 75 years or older. Is each of the boldface numbers a parameter or a statistic?

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  1. 25 May, 11:41
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    Answer: 9% parameter, 3% statistic

    Step-by-step explanation: Parameter and statistic are are statistical terms used to describe a group or observation.

    However, the distinction between a parameter and a statistic is in the measured observation.

    Parameter is used to describe an entire population while statistic is used to describe a sample.

    Where a population refers to the entire number of people or inhabitant of a particular country while a sample refers to a subset of observation drawn randomly from a population which serves a representative of the entire population.

    In the question above, 9% is used to make a description of the whole American population who are at least 75 years of age. While,

    3% is used to describe a subset of the American population (sample) who are 75 years or older.
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