means you go down on me and I owe you one.
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65.8
2x34 is 68
43
to find the mean of a group of numbers, add them together and divide by the number of numbers there are in that group. in this case there are 6
The empirical rule is 68 - 95 - 99.7. 68% is the area for +/- 1 standard deviation (SD) from the mean, 95% is the area for +/- 2 SD from the mean; and 99.7% is the area for +/- 3 SD from the mean.