Mashaal Masha
Mashaal Masha
 Mar 04, 2024
0
Texting behavior Talks on cell phone daily Does not talk on cell phone daily Total
Light 110 146 256
Medium 139 164 303
Heavy 166 74 240
Total 415 384 799
In a study of cell phone use, 799 randomly selected US teens were asked how often they talked on a cell phone and about their texting behavior. The data are summarized in the table above. Based on the data from the study, an estimate of the percentage of US teens who are heavy texters is 30% and the associated margin of error is 3%. Which of the following is a correct statement based on the given margin of error?
Difficulty: Hard
A: 

Approximately 3% of the teens in the study who are classified as heavy texters are not really heavy texters.

B: 

It is not possible that the percent of all US teens who are heavy texters is less than 27%.

C: 

The percent of all US teens who are heavy texters is 33%.

D: 

It is doubtful that the percent of all US teens who are heavy texters is 35%.

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MathProblem-Solving and Data Analysis