Question: What are the upper and lower limits of a 95% confidence interval given the following estimation formulas? (a) 12 2.3 (b) 94 (2.228)

What are the upper and lower limits of a 95% confidence interval given the following estimation formulas?
(a) 12 ± 2.3
(b) 94 ± (2.228) 24√64
(c) 20/5 ± (1.96)(0.75)

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