Teenagers' use of emoticons in school writing. Refer to the Pew Internet and American Life Project (Apr. 2008) sur- vey of the writing habits of U.S. teenagers, Exercise 7.69 (p. 343). Recall that in a random sample of 700 teenag- ers, 448 admitted to using at least one informal element in school writing assignments. [Note: Emoticons, such as using the symbol “:)" to represent a smile, and abbrevia- tions, such as writing "LOL" for "laughing out loud," are considered informal elements.] Is there evidence to indi- cate that less than 65% of all U.S. teenagers have used at least one informal element in school writing assignments? Test the relevant hypotheses using a = .05.

Question
Teenagers' use of emoticons in school writing. Refer to the
Pew Internet and American Life Project (Apr. 2008) sur-
vey of the writing habits of U.S. teenagers, Exercise 7.69
(p. 343). Recall that in a random sample of 700 teenag-
ers, 448 admitted to using at least one informal element
in school writing assignments. [Note: Emoticons, such as
using the symbol “:)" to represent a smile, and abbrevia-
tions, such as writing "LOL" for "laughing out loud," are
considered informal elements.] Is there evidence to indi-
cate that less than 65% of all U.S. teenagers have used at
least one informal element in school writing assignments?
Test the relevant hypotheses using a = .05.
Expand
Transcribed Image Text

Teenagers' use of emoticons in school writing. Refer to the Pew Internet and American Life Project (Apr. 2008) sur- vey of the writing habits of U.S. teenagers, Exercise 7.69 (p. 343). Recall that in a random sample of 700 teenag- ers, 448 admitted to using at least one informal element in school writing assignments. [Note: Emoticons, such as using the symbol “:)" to represent a smile, and abbrevia- tions, such as writing "LOL" for "laughing out loud," are considered informal elements.] Is there evidence to indi- cate that less than 65% of all U.S. teenagers have used at least one informal element in school writing assignments? Test the relevant hypotheses using a = .05.

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