# Problem 4A study was carried out to see how effective a newly implemented neighborhood watch program

Problem 4A study was carried out to see how effective a newly implemented neighborhood watch program in reducing the number of 911 calls to the police. Six city blocks in the target population were randomly selected and had their numbers of 911 calls per week recorded before and after the implementation of the neighborhood watch program. The data from this study are shown below. Assume that the underlying population is normally distributed, answer the following questions.Block IDNumber of 911 calls per weekBeforeAfter1164.5148.62172.6174.53142.6136.24122.3134.65150.7132.66189.6164.0(1) (2 points) What are the null and alternative hypotheses of the appropriate test?(2) (9 points) Conduct the test in part (1) at the 0.05 level of significance. Test statistic: P-value: Conclusion: Interpretation:(3) (6 points) Construct a one-sided 95% confidence interval with lower bound for the true difference in population means. Interpret this confidence interval.