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; among 283 shots fired by Los Angeles police, 77 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 the Los Angeles police. Let New York police be represented by p1. Construct a 95% confidence interval and then choose all that apply to this problem. A. Since zero is
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; among 283 shots fired by Los Angeles police, 77 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 the Los Angeles police. Let New York police be represented by p1.
Construct a 95% confidence interval and then choose all that apply to this problem.
A. Since zero is contained in the confidence interval there appears to be no differnece in the proportions
B. New York police have a higer hit proportion than Los Angelos police
C. Confidence interval: (-0.0004, 0.1303)
D. We fail to reject the null hypothesis
E. We should reject the null hypothesis
F. Confidence Interval: (0.0396, 0.1729)
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