Due to the popularity of instant messaging and social networking sites among American teenagers, informal elements such as emoticons and abbreviations have worked their way into teenagers’ school writing assignments. A survey interviewed 700 randomly selected U.S. teenagers by telephone on their writing habits. Overall, 448 of the teenagers admitted to using at least one informal element in school writing assignments. Using the survey results, construct a 99% confidence interval for the proportion of all U.S. teenagers who have used at least one informal element in school writing assignments. (-0.6302, -0.5902) (0.5933, 0.6867) (0.6044, 0.6756) (0.59779, 0.6822) (0.61016, 0.6698)
Due to the popularity of instant messaging and social networking sites among American teenagers, informal elements such as emoticons and abbreviations have worked their way into teenagers’ school writing assignments. A survey interviewed 700 randomly selected U.S. teenagers by telephone on their writing habits. Overall, 448 of the teenagers admitted to using at least one informal element in school writing assignments. Using the survey results, construct a 99% confidence interval for the proportion of all U.S. teenagers who have used at least one informal element in school writing assignments.
Due to the popularity of instant messaging and social networking sites among American teenagers, informal elements such as emoticons and abbreviations have worked their way into teenagers’ school writing assignments. A survey interviewed 700 randomly selected U.S. teenagers by telephone on their writing habits. Overall, 448 of the teenagers admitted to using at least one informal element in school writing assignments. Using the survey results, construct a 99% confidence interval for the proportion of all U.S. teenagers who have used at least one informal element in school writing assignments.
(-0.6302, -0.5902)
(0.5933, 0.6867)
(0.6044, 0.6756)
(0.59779, 0.6822)
(0.61016, 0.6698)
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