Solved: Safety observers in texas watched children at play in eight, Basic Statistics

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Safety observers in texas watched children at play in eight

Question: Safety. Observers in Texas watched children at play in eight communities. Of the 814 children seen biking, roller skating, or skateboarding, only 14% wore a helmet.

a) Create and interpret a 95% confidence interval.

b) What concerns do you have about this study that might make your confidence interval unreliable?

c) Suppose we want to do this study again, picking various communities and locations at random, and hope to end up with a 98% confidence interval having a margin of error of How many children must we observe?

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