Question 6.418

25. e-Cigarettes. A 2014 study17 found that 6.5% of adolescents have tried e-cigarettes. (Though e-cigarettes have been marketed as cessation helpers, the study found that use of e-cigarettes does not discourage, and may encourage, conventional cigarette use among adolescents.) For a sample of 1000 U.S. adolescents, approximate the following probabilities:

  1. More than 65 have tried e-cigarettes.
  2. At least 65 have tried e-cigarettes.
  3. Less than 65 have tried e-cigarettes.
  4. Between 60 and 70 (inclusive) have tried e-cigarettes.

6.6.25

(a) 0.4761 (b) 0.5239 (c) 0.4761 (d) 0.5223