Question: Let's say that this study was completed and reported that Treatment A resulted in an average hospital stay of 0.30 days less than Treatment B,

Let's say that this study was completed and reported that Treatment A resulted in an average hospital stay of 0.30 days less than Treatment B, with a 95% margin of error of 0.44. Based on this information, what is the study's 95% confidence interval for the true mean difference in hospitalization between these two treatments?

(a)

(0.14, 0.74)

(b)

(0.30, 0.44)

(c)

(-0.14, 0.74)

(d)

(-0.56, 1.16)

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