Question: 14. A study used X-ray computed tomography (CT) to collect data on brain volumes for a group of patients treated with certain medication and a

14. A study used X-ray computed tomography (CT) to collect data on brain volumes for a group of patients treated with certain medication and a control group of persons without the medication. Sample results (in mL.) are given below for total brain volumes.

Treated patients: n = 10, mean = 1510.03, s = 150.84 Control group: n = 10, mean = 1268.41, s = 137.97

b. Construct the appropriate confidence interval for the difference between the mean volume of treated patients and the mean brain volume of persons in the control group. Show or explain your thinking.

c. Interpret the confidence interval from part (b).

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