A surgeon in a large hospital is investigating acute appendicitis in people aged 65 or over. Based on retrospective charts, he finds that of 120 patients in this age group with a diagnosis confirmed at operation 73 were women and 47 were men. Calculate a 95% confidence interval for the proportion of females with acute appendicitis.

Select the option that is closest to your answer among the options given.

1). 0.43 to 0.5

2). 0.35 to 1.14

3). 0.52 to 0.70

4). 0.6 to 0.8