Canary Islands PAU Mathematics II / Matemáticas II COPAU ULPGC ULL

Practice session

A sample of n = 64 light bulbs is drawn from a normal population with known standard deviation σ = 40 hours, and the sample mean lifetime is x̄ = 1200 hours. Construct the 95% confidence interval for the population mean μ. (Use z_(α/2) = 1.96.)

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