The 2010 General Social Survey asked the question, “After an average work day, about how many hours do you have to relax or pursue activities that you enjoy?” to a random sample of 1,155 Americans. The average relaxing time was found to be 1.65 hours. Determine which of the following is an observation, a variable, a sample statistic, or a population parameter.
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Solution
a) An American in the sample
Observation
b) Number of hours spent relaxing after an average work day
Variable
c) 1.65
Sample statistic (mean)
d) Average number of hours all Americans spend relaxing after an average work day
Population parameter (mean)