1. VAR(X) = 2.8
2. VAR(Z) = 1.41
3. SD(W) = 1.4 (to 2 significant figures)
4. VAR(X) = 0.5
5. VAR(X) = 0.75
6. SD(X) = 2.4 (to 2 significant figures)
7. a. k = 0.1
b. E(Y) = 5.4
c. VAR(Y) = 4.04
8. VAR(number of tails) = 0.5
1. VAR(X) = 2.8
2. VAR(Z) = 1.41
3. SD(W) = 1.4 (to 2 significant figures)
4. VAR(X) = 0.5
5. VAR(X) = 0.75
6. SD(X) = 2.4 (to 2 significant figures)
7. a. k = 0.1
b. E(Y) = 5.4
c. VAR(Y) = 4.04
8. VAR(number of tails) = 0.5