The attached photo depicts normal distribution (Bell Curve) data. There are 143 bullets pictured, ranging from 113.8gr to 116.2gr. The mean (average) is 114.90699, though you’ll agree that no single bullet is likely to weigh exactly at the mean. The mode is 115...this is another type of average, and merely indicates which bullet weight appears most often (21 times).
The standard deviation is 0.43761. This means that 68% (97.25) of the bullets will range between 115.3446gr and 114.46938gr. Counting them out you’ll find that 89 bullets lie between 115.3gr and 114.5gr, so the remaining 8.25 bullets are either 115.4gr or 114.4gr.
https://thefiringline.com/forums/attachment.php?attachmentid=108198&d=1536628850
Just another public service from someone new to reloading, but highly schooled in statistics.
The standard deviation is 0.43761. This means that 68% (97.25) of the bullets will range between 115.3446gr and 114.46938gr. Counting them out you’ll find that 89 bullets lie between 115.3gr and 114.5gr, so the remaining 8.25 bullets are either 115.4gr or 114.4gr.
https://thefiringline.com/forums/attachment.php?attachmentid=108198&d=1536628850
Just another public service from someone new to reloading, but highly schooled in statistics.