In a sample of 17 participants, a researcher estimates the 90% CI for a sample with a mean of MD = 7 and an estimated standard error for the difference scores (SMD) of 2.2. What is the confidence interval at this level of confidence?
A. 90% CI 2.4, 11.6
B. 90% CI 3.2, 10.8
C. 90% CI 4.8, 9.2
D. There is not enough information to answer this question.
Ans: B
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