Question

8.3.28-T Quitton Halo Acelgone provider has a business objective of wanting to collected from sandom sample of 500 S ober. There the portion of subscbers who wo that 155 of the subscribers upgrade to a new de to p in phone with provedores were made av one alrededor Concepts (a) and (b) below at a subtly reduced cost Date for the colon i es that Constructa 95% contiene intervall sus (Round to four decimal places as needed)

Answer 1

a x. no. of subsesibera apgaulled to new cellphone at reelucol costo i X=165 he sample size = soo Population pro sample poopution = p = x in = 165 20:33 soo 1-0.33 = 0.67. interwell for population 95% confidance Propsion p CÊ - 2412 [ þę ß + 2412 | Åĝ) 22/2 2212 ((0.331 - 2412 (0.33)*(0.61) I soo (0.33) + 24, ((0.33) (0.67) s oo i 2 /2 = 20.028=1-96 L = 6.05 4 04/2 = 0.025 .: Zorozs -1.96 Co.33 - 1.96x0.0210 / 0.33 + 1.9cx o'02101 (0.3 -0.0412 0.33 +0.0412) (0.2888, 0.3712) lower limit = 0.2888 Upper limit = 0.3712