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The 95% confidence interval for a slope 1 is [1.2, 1.4], which of the following could be the 90% confidence interval for 1? Please select

The 95% confidence interval for a slope 1 is [1.2, 1.4], which of the following could be the 90% confidence interval for 1? Please select the best answer.

A. [1.23, 1.37]

B. [1.15, 1.45]

C. [1.12, 1.42]

D. [1.20, 1.34]

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