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For a sample of 11 independent observations from a normal distribution of unknown μ and unknown variance σ², the sample mean is 74.6 and sample variance is 2.2. What is the lower point of the 90% confidence interval for μ?

(1) 73.1206

(2) 72.8469

(3) 73.7896

(4) 73.9863

(5) 73.1167

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