- In a random sample of jails (N = 150), the mean number of male juveniles confined per
facility was 1.17 (s = 6.21).
A. Calculate the standard error of the mean (0.25 point).
B. Construct a 95% confidence interval around the number of male juveniles
confined in jails. Interpret it (0.5 point). - The sheriff’s offices sampled in the Law Enforcement Management and Administrative
Statistics (N = 827) reported that their agencies require new recruits to complete a mean
of 599 hours of academy training (s = 226).
A. Calculate the standard error of the mean (0.25 point).
B. Construct a 99% confidence interval around the number of hours of training
required of new recruits by sheriff’s offices. Interpret it (0.5 point). - In the LEMAS survey, 45% of the sampled sheriff’s offices (N = 823) reported that their
agencies’ formal mission statements do not include a community-policing element.
A. Calculate the standard error of the proportion (0.25 point).
B. Construct a 99% confidence interval around the proportion of sheriff’s offices that
have a community-policing element in their formal mission statement. Interpret it
(0.5 point). - A policing researcher is interested in citizen encounters with the state police and
conducts a survey of people who have had an encounter with a police officer in the past
month. Within his sample of 472 respondents who reported having an encounter with a
police officer in the past month, 151 reported that their encounter was negative.
A. Calculate the standard error of the proportion (0.25 point).
B. Construct a 95% confidence interval around the proportion of respondents who
had a negative encounter with a police officer in the past month. Interpret it (0.5
point)
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