1. Dr. Granger takes a simple random sample from a well-defined population of interest. Which of the following is true regarding the mean (average) of a variable that Dr. Granger calculates?

   Select one:

   a. It is a population parameter

   b. It is a population parameter that can be used to calculate a statistic

   c. It is a sample statistic that can be used to build the sampling frame

   d. It is a sample statistic that can be used to estimate a population parameter

   
   

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