Question

Due to the popularity of instant messaging and social​networking, informal elements such as emoticons​ (e.g., the symbol​":)" to represent a​ smile) and abbreviations​ (e.g., "LOL" for​"laughing out​ loud") have worked their way into​ teenagers' school writing assignments. A survey interviewed 900 randomly selected teenagers by telephone on their writing habits.​ Overall, 446 of the teenagers admitted using at least one informal element in school writing assignments. Based on the survey​ results, construct a 90​% confidence interval for the proportion of all teenagers who have used at least one informal element in school writing assignments. Give a practical interpretation of the interval.

The 90% confidence interval is ( _____, _______ ). (Round to three decimal places as needed.

Answer 1