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A researcher seeks to estimate the average number of books students on a particular campus bought during the last school year. She obtained the following

A researcher seeks to estimate the average number of books students on a particular campus bought during the last school year. She obtained the following data by questioning a random sample of 15 students.Calculate the degrees of freedom of the following sample data:

2 8 5
3 6 2
5 4 4
3 5 7
6 9

3

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