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| rev | Admin | (Created page with "'''Solution: E''' Let <math>\sigma^2 </math> equals the variance of a single measurement error. A quick calculation gives <math>\sigma^2 = 2</math>. The average measurement is the sum of the measurements divided by 18, and is approximately normally distributed with mean 200 and variance <math>\sigma^2/18 = 1/9</math>, and the approximate probability that the average measurement is between 199 and 201 equals <math display = "block"> P(Z \in \pm 3 ) = 0.9973 </math> w...") | Jun 27'24 at 20:58 | +525 |