Suppose you want to build a 90% confidence interval for the ATE when the average outcome for the treated (55 subjects) is 12, with a sample standard deviation of 4, while the average outcome for the control (65 subjects) is 10, with a sample standard deviation of 6. Which of the following would be the proper confidence interval?
A. 0 ± 1.96 
B. 0 ± 1.96 
C. 2 ± 1.65 
D. 0 ± 1.65 
Answer: C
Biology & Microbiology
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