-3 + 4 + (-2) = 1 + (-2) = 1 - 2 = -1.
3
1 1/2 + 1 1/2 = 3
Standard deviation = sqrt(variance) Variance = E[X2] - E[X]2 E[X] = sum(X)/n = 35/9, so E[X]2 = 1225/81 E[X2] = sum(X2)/n = 189/9 = 1701/81 Variance = 476/81 Standard deviation = sqrt(476/81) ~ 2.42
2 and 1 .their sum is 3 .difference is 1
yes 1428/3 = 476 if you add numbers up and you can divide sum by 3 then it is divisible by 3 1+4+2+8 = 15 which is divisible by 3
3 + 2 = 5. (sum) 3 - 2 = 1. (difference)
1/2+1/2=1 1/3+1/3=2/3 1-2/3=1/3 Answer: 1/3
-3 + 4 + (-2) = 1 + (-2) = 1 - 2 = -1.
3
3
Standard deviation = sqrt(variance) Variance = E[X2] - E[X]2 E[X] = sum(X)/n = 35/9, so E[X]2 = 1225/81 E[X2] = sum(X2)/n = 189/9 = 1701/81 Variance = 476/81 Standard deviation = sqrt(476/81) ~ 2.42
1 1/2 + 1 1/2 = 3
2 and 1 .their sum is 3 .difference is 1
-2
A sum of 4 is more likely. Out of the 36 possible outcomes with a pair of 6-sided dice, only one will have a sum of 2 {1-1}. Three of the possibilities sum to 4. {1-3, 2-2, 3-1}
1 + 2 = 3