The following data are the final exam scores of the 15 students in a small calculus class. 93 83 72 74 98 96 90 80 80 75 77 91 81 68 86 Are these population or sample data? Select an answer What is the range for this data set? What is the variance for this data set? Round your answer to three decimal places, if necessary. What is the standard deviation for this data set? Round your answer to three decimal places, if necessary.

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