die going tổ calculate the standard deviation for the following set of sample data. 15 8. 9. 12 13 1) Calculate the mean. 11.4 2) Fill in the table below: Fill in the differences of each data value from the mean, then the squared differences. (x – a)² 15 3.6 12.96 8. -3.4 11.56 9 -2.4 5.76 12 0.6 0.36 13 1.6 2.56 %3D

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