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Exercise 19

Avg difficulty 3.0

Cyberbullying rates. Teens were surveyed about cyberbullying, and 54% to 64% reported experiencing cyberbullying (95% confidence interval). Answer the following questions based on this interval.

  1. A newspaper claims that a majority of teens have experienced cyberbullying. Is this claim supported by the confidence interval? Explain your reasoning.

  2. A researcher conjectured that 70% of teens have experienced cyberbullying. Is this claim supported by the confidence interval? Explain your reasoning.

  3. Without actually calculating the interval, determine if the claim of the researcher from part (2) would be supported based on a 90% confidence interval?

Diez, Barr & Çetinkaya-Rundel, OpenIntro Statistics, Foundations for inference, End-of-Chapter Exercises, Exercise 19

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Adapted from OpenIntro Statistics © 2019 David Diez, Mine Çetinkaya-Rundel & Christopher D. Barr. Licensed under CC BY-SA 3.0. Source: OpenIntro Statistics. Imported at revision fee2509.