# Confidence Intervals: Upper and Lower Limit

A sociologist is studying the prevalence of crime in one major city. In a sample of 225 randomly selected residents, 60 say that they have been victimized by a criminal. Based on this sample, construct a 95% confidence interval for the proportion of all residents in this city who have been victimized by a criminal. Then complete the table below.

A. What is the lower limit of the 95% confidence interval?

B. What is the upper limit of the 95% confidence interval?

Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

© BrainMass Inc. brainmass.com June 3, 2020, 10:22 pm ad1c9bdddfhttps://brainmass.com/statistics/confidence-interval/confidence-intervals-227848

#### Solution Preview

Confidence Intervals

A sociologist is studying the prevalence of crime in one major city. In a sample of 225 randomly selected residents, 60 say that they have been victimized by a criminal. Based on this sample, construct a 95% confidence interval for the proportion of all residents in this city who have been victimized by a criminal. Then complete the table ...

#### Solution Summary

This solution contains step-by-step instructions on how to calculate the upper and lower limit of the 95% confidence interval. All workings and formulas are shown.