## Introductory Statistics 9th Edition

Mean =μ = $∑xP(x)$ = 0.5001 Thus, it is expected that 0.5001 from these 12 persons are left-handed, with the standard deviation of 0.5840. Standard Deviation = $\sqrt∑x^{2}P(x) -μ^{2}$ = $\sqrt 0.5911-0.5001^{2}$ =0.5840