Chapter 6 - Section 6.2 - Assess Your Understanding - Applying the Concepts - Page 345: 44a

Mean = 180 Standard Deviation $\approx$ 4.243

i) Mean of the binomial is given by np np = 200 x 0.90 = 180 ii) Standard Deviation of the binomial is given by $\sqrt {np(1-p)}$ $\sqrt {np(1-p)}$ = $\sqrt {200\times0.90\times 0.10}$ = 4.242640687 $\approx$ 4.243