## Introductory Statistics 9th Edition

a. Mean =μ = ∑xP(x) = 1.59 Standard Deviation = $\sqrt∑x^{2}P(x) -μ^{2}$ = $\sqrt 3.45-1.59^{2}$ =0.9602 b. a. Mean =μ = ∑xP(x) = 7.07 Standard Deviation = $\sqrt∑x^{2}P(x) -μ^{2}$ = $\sqrt 51.11-7.07^{2}$ =1.0607