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Hello Everyone, I just have one math question that I need assistence on. I'd appreciate if you could help me. Thanks for your time and your assistence. It's much needed. :)


Heres the question (or statement rather):

Find the standard deviation of the data: 2, 4, 7, 8, 9. Round to the nearest tenth. 


I would like for you to possibly show me the steps in how you solved this problem (please) because I do not just want the answer, I also want to understand this so that I can refer back to this for other/similar problems. Once again, thanks so much for helping me. I truly appreciate it. :)

 Sep 24, 2018

First find the mean of the data numbers

2+4+7+8+9   / 5   = 6


Take the diff from the mean of each of the numbers


4   2  1  2  3      Square these and find the mean

16 4  1  4  9        Mean = 6.8    and take the square root of this     2.6 = S.D.

 Sep 24, 2018
edited by ElectricPavlov  Sep 24, 2018

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