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In a study of police gunfire reports during a recent year, it was found that among 540 shots fired by New York City police, 210
In a study of police gunfire reports during a recent year, it was found that among 540 shots fired by New York City police, 210 hit their targets; and among 283 shots fired by Los Angeles police, 80 hit their targets. We want to use a 0.05 significance level to test the claim that New York police have a higher hit rate than Los Angeles police. Let New York police be represented byp1.
Construct a 95% confidence interval and then choose all that apply to this problem.
- Confidence Interval: (-0.0328, 0.0891)
- New York police have a lower hit proportion than Los Angeles police.
- Since zero does not fall in the confidence interval we can assume that there is a significant difference in the values
- Confidence Interval: (0.0503, 0.1621)
- New York police have a higher hit proportion than Los Angeles police
- Confidence Interval: (0.0396, 0.1729)
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