![]() ![]() Recall that a parameter is a numerical value that characterizes some aspect of the population, and a statistic is a numerical characteristic of a sample of data taken from the population. From the problem statement, which of the values 7.1, 6.8, 7.6, and 4.9 are parameters and which are statistics? He finds that the mean age of the 6060 cars he samples is 7.6 years and the standard deviation of those 60 cars is 4.9 years.Ī. For a study to determine the reliability of classified ads, a reporter randomly selects 6060 of these used cars and plans to visit each owner to inspect the cars. The distribution of ages is right-skewed. The mean age of all 606 used cars for sale in a newspaper one Saturday last month was 7.1 years, with a standard deviation of 6.8 years.
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