Question

19. When calculating a confidence interval, keeping the sample size the same but decreasing the confidence level, will a. decrease the width of the confidence interval b. decrease the margin of error c. make us less sure that our confidence interval contains the true parameter d. all of the above 20. A research company polled a random sample of 799 U.S. teens about internet use.0.49 of those teens reported that they had misrepresented their age online to gain access to websites and online services. The 9596 confidence interval for this number is (0.456, 0.525). Explain the meaning of "95% confident" in this context 95% of teens have misrepresented their age online. If one were to collect many random samples of teens, about 95% of the confidence intervals one constructs would contain the true sample proportion of teens who admit to misrepresenting their age online The true proportion of all teens who have misrepresented their age online is within95% of the 49% reported in this sample of 799 U.S. teens. If one were to collect many random samples of 799 teens, about 95% of the confidence intervals one constructs would contain the true proportion of all teens who admit to misrepresenting their age online a, b. c. d. led conditions is at le

Answer 1

19.)The advantage of a lower confidence level is that you get a narrower, more precise confidence interval.

Therefore option D

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