[Fictitious data] A researcher is assessing the effect of a substance abuse program
on the likelihood of reducing rearrest in prisoners. The group of prisoners who
completed the program had an average of 10 rearrests with a standard deviation of 1.5.
Using the information above, calculate the confidence interval associated with a 75%
confidence level. (Again, you must first obtain the z-score associated with a 75%
confidence level using the area under the curve table.)
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