Hello, this is my first contribution to Wikipédia !
I would like to raise a point on this picture. I think the 99.7% confidence interval is six standard deviations wide. That's what mentions the x-axis: µ +/- three std. But at the top, between the arrows, it's written "3 standard deviations". So the picture is a little bit contradictory and might confuse the reader.
And that's the same thing for the other intervals: the number of standard deviations for the widths of the confidence intervals should be doubled (between the horizontal arrows): 2, 4 and 6.
Rififi 365 (talk) 09:44, 28 June 2015 (UTC)
