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1. You are given the following information. N = 25 X̄(x bar) = 16 σx =...

1. You are given the following information.

N = 25

X̄(x bar) = 16

σx = 8

a. What is the total length of the 95% confidence interval of μ?

b. (Now ignore N = 25) What is the minimum sample size we need to make the total length of 95% CI of μ less than 5?

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