I need to calculate the standard deviation/bell curve....Ive never had statistics!!?

N

Nurse

New member
I need the mean of these twelve numbers: 18,24,67,53,36,64,124,91,101,106,102,127. I also need to know 2 standard deviations above and below the mean. My surgeon says that the two standard deviations would be 66.6% and 99.9% (which make NO sense to me!!) I need to graph them on a bell curve. Thanks!!
 
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