Texting while driving: The accident rate for students who didn’t text while using a driving simulator was 7%. In a driver distraction study of 1,876 randomly selected students, the accident rate for...



Texting while driving: The accident rate for students who didn’t text while using a driving simulator was 7%. In a driver distraction study of 1,876 randomly selected students, the accident rate for students who texted while driving was higher than 7%. This difference was statistically significant at the 0.05 level.


Which of the following best describes how we should interpret these results?




  1.  Because of the large size of the sample, these results are strong evidence that texting accounts for a much larger proportion of accidents in the population of student drivers.

  2.  With a large sample, statistically significant results suggest a large increase in the accident rate for the texting group over the control group.

  3.  With a large sample, statistically significant results may actually be only a small improvement over the control group (depending on the size of the increase in percentages).

  4.  Regardless of the sample size, a statistically significant result means there is a meaningful difference in the accident rates for the two groups.




Jun 09, 2022
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