The standard deviation of the average of 144 throws of a die. The standard deviation of the sum of 144 throws of a die, conditional on the observation that at least one throw was a five Standard deviation of what? You may think that’s obvious, but ah… The standard deviation of one throw of a die, that you try to estimate based on 144 observations.
The mean for a single roll of a d6 die with face 1–6 is 3.5 and the variance is . Let’s say you want to roll 100 dice and take the sum.
The sum is 21, and 21 divided by 6 is 3.5. Another way to think about it: if the die is fair, you will roll (on average) as many 1s as 6s. The larger N is, the more likely it is that every 1 will match a 6, and vice versa. That's what it means to be "fair". So, if you roll it N times, you'll get about N/2 1s and N/2 6s.
Is there an easy way to calculate standard deviation for dice rolls? - Quora Is there an easy way to calculate standard deviation for dice rolls? Tableau your Excel data. Level up your analytics toolkit. Pair Excel with Tableau and transform data into actionable insights. Yes.