A researcher examining the topic of juvenile delinquency is interested in investigating the average age of first contact with a disciplinary force (measured by school suspensions) Based on a random sample of 185 students from a school district, she calculates a sample mean of 13 6 years and a sample standard deviation of 1 2 years Based on 0 01, calculate the resulting confidence interval for this data set Based on 0 05, calculate the resulting confidence interval for this data set Interpret the two confidence intervals in your own words, to demonstrate understanding of the use of confidence intervals Make sure to apply them to the specific research question that was asked You are reading a newspaper article that claims a new crime prevention program is effective The researchers state that as a result of the program, there was a mean reduction of 1 69 robberies per month across the cities included in the sample To support their conclusion, they report a 95 confidence interval of 1 81 5 19 (i e , 1 69 3 50) for the mean reduction in robberies Do you agree with the researchers' claim that this program was effective Fully explain why or why not, using the confidence interval result provided A researcher is discussing results of a study of a new work release program She compared a sample of paroled inmates who completed the program while they were incarcerated to a sample of parolees who did not She found that 41 of the work release group was rearrested within one year of release, compared to 48 of the non work release group She asserts that this is strong proof that the program works Do you agree with her conclusion, and why or why not Prepare a response using the relevant concepts from the module, including the use of an appropriate statistical test contained in Table 9 2 (Chapter 9)of the textbook Table 9 2 Choosing the Appropriate Bivariate Test Based on the Variables' Level of Measurement The DV is The IV is Categorical Continuous Categorical Chi square t test ANOVA Continuous N A Correlation

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A researcher examining the topic of juvenile delinquency is interested in investigating the average age of first contact with a disciplinary force (measured by school

A researcher examining the topic of juvenile delinquency is interested in investigating the average age of first contact with a disciplinary force (measured by school suspensions). Based on a random sample of 185 students from a school district, she calculates a sample mean of 13.6 years and a sample standard deviation of 1.2 years.

Based on ?=0.01, calculate the resulting confidence interval for this data set.
Based on ?=0.05, calculate the resulting confidence interval for this data set.
Interpret the two confidence intervals in your own words, to demonstrate understanding of the use of confidence intervals. Make sure to apply them to the specific research question that was asked.

You are reading a newspaper article that claims a new crime prevention program is effective. The researchers state that as a result of the program, there was a mean reduction of 1.69 robberies per month across the cities included in the sample. To support their conclusion, they report a 95% confidence interval of -1.81 ?? 5.19 (i.e., 1.69 3.50) for the mean reduction in robberies. Do you agree with the researchers' claim that this program was effective? Fully explain why or why not, using the confidence interval result provided.
A researcher is discussing results of a study of a new work release program. She compared a sample of paroled inmates who completed the program while they were incarcerated to a sample of parolees who did not. She found that 41% of the work release group was rearrested within one year of release, compared to 48% of the non-work release group. She asserts that this is strong proof that the program works. Do you agree with her conclusion, and why or why not? Prepare a response using the relevant concepts from the module, including the use of an appropriate statistical test contained in Table 9.2 (Chapter 9)of the textbook.

Table 9.2 Choosing the Appropriate Bivariate Test Based on the Variables' Level of Measurement The DV is .. The IV is . . . Categorical Continuous Categorical Chi-square t test ANOVA Continuous N/A Correlation