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January 30, 2015

Posted by **shelly** on Friday, March 26, 2010 at 9:44pm.

57,61,57,57,58,57,61

61,52,69,64,46,54,47

- statistics -
**MathGuru**, Saturday, March 27, 2010 at 9:53amThe standard deviation is approximately 1/4 the range; therefore, determine the difference between the highest and lowest value in each data set, then divide by 4. This is a rough estimate, but if you actually calculate the standard deviation and it's way off the estimate, then you may need to redo your calculations.

I hope this will help get you started.

- statistics -
**Jone**, Saturday, April 17, 2010 at 6:33pmFind the standard deviation using the rule of thumb for each of the data sets

57,61,57,57,58,57,61

61,52,69,64,46,54,47

- statistics -
**joy**, Sunday, April 1, 2012 at 10:50pmfirst 7 is 1

second 7 is 5.75

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