Find the following confidence intervals for μ ¯d , assuming that the populations of paired differencesare normally distributed.(a) n = 11, d = 25.4, sd = 13.5, confidence level = 99%(b) n = 23, d = 13.2, sd = 4.8, confidence level = 95% (c) n = 18, d = 34.6, sd = 11.7, confidence level = 90%

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