Question

Ses In a Gallup poll, 1025 randomly selected adults were surveyed, and 298 of them said that they used the Internet for shopping at least a few times a year. Find a 95% confidence interval estimate of the percentage of adults who use the Internet for shopping at least a few times a year, Hon ork A. 29.07% +2.78% O B. 29.07% +5.56% OC. 29.07% +3.06% OD. 29.07% 11.12% & T lan book unch

Answer 1

solution : - Griven Sample size (n)= 1025 x = 298 Ê = x Then 0.2907 298 1025 29.07 % Then 1-Ê 1-0.2907 70193 0:7093 and 0.95 1-2- Le 0.05 을 = 0.025 is Then 95 % confidence interval + Ř CHÊ 2212 0.2907X0.7093 0.2907 TO + Zo.025 1025 + 1.96 X 0.0142 0.2907 + 0.0278 0.2907 2.78 % 29.07% option is correct. Hence