Answer to Question #307398 in Statistics and Probability for secret

Question

The Malayo Colleges Mindanao recently conducted a study analyzing the privacy management habits of teen internet users. In a group of 118 teens, 108 reported having more than 100 followers on Twitter. Find the upper bound of a 90% confidence interval for the true proportion of teens who would report having more than 100 followers on Twitter. 

Answer 1

$p=\frac{108}{118}=0.9153.$

Upper bound $=0.9153+1.645\sqrt{\frac{0.9153(1-0.9153}{118}}=0.9575.$