= 40 ± 1.96 x 1.732 π = 36.6% to 43.4% 9. = 80% P Sep = 2.8284 95% confidence interval is 80 ±1.96×2.8284 = 74.5% to 85.5% 10. = 400 n = £230 = 42 σ SEP = = 2.1 (a) 95% confidence interval is by 230 ± 1.96 x 2.1 = 230 ± 4.12 or 225.1 to 234.1 (b) 99% confidence interval is given by 230 ± 2.58 x 2.1 = 230 ± 5.42 or 224.6 to 235.4
π = 40 ± 1.96 x 1.732 = 36.6% to 43.4% 9. P = 80% Sep = 2.8284 95% confidence interval is 80 ±1.96×2.8284 = 74.5% to 85.5% 10. n = 400 = £230 σ = 42 SEP = = 2.1 (a) 95% confidence interval is by 230 ± 1.96 x 2.1 = 230 ± 4.12 or 225.1 to 234.1 (b) 99% confidence interval is given by 230 ± 2.58 x 2.1 = 230 ± 5.42 or 224.6 to 235.4
Solutions%20Manual.docx