Calculate the ci for each group

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A researcher believes that maximum security inmates have a more lengthy arrest record than minimum security inmates. She collects a sample of 225 inmates from the minimum security prison and 180 inmates from the maximum security prison and computes the following data from the samples:

Mean Standard Deviation
Minimum: 12.4 3.4
Maximum: 14.1 2.8

Calculate the 99% CI for each group. Based on these data, is the researcher correct that maximum security inmates have a longer arrest records than minimum security inmates? Why or why not?

Reference no: EM132844467

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