The National Judicial Reporting Program (NJRP) collects data on a variety of sen

Question

The National Judicial Reporting Program (NJRP) collects data on a variety of sentencing related topics. A random sample of persons convicted of weapons offenses is comprised of some individuals who were convicted by a jury and some individuals who were convicted by a judge. The length of sentence imposed - measured in months - is also provided. The data are below. You want to find out if there is a difference in sentence length between conviction by a jury and conviction by a judge. What type of test should you use?

Explanation / Answer

Here we will use t test for difference between two means

with

H0: there is no difference

H1:there is difference

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