According to a Pew Research Center report from 2012, the average commute time to work in California is 27.5 minutes. To investigate whether a different average is true for the small city that she lives in, a California high school student surveys 45 people she knows-her teachers, her parents and their friends and co-workers - and finds the average commute time for this sample to be 24.33 minutes, with a standard deviation of 9.53 minutes The data were not strongly skewed
a. Identify the observational units for this study.
b. Identify the variable of interest and state whether it is categorical or quantitative.
c. Identify (in words and using an appropriate symbol) the parameter of interest
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