3. A random sample of 25 observations taken from a population that is normally distributed produced a sample mean of 58.5 and a standard deviation of 7.5. Find the critical and observed values of t for each of the following tests of hypothesis using a = 0.01. a) H₂:μ = 55 Ha:μ > 55 b) H₂:μ = 55 Ha:μ # 55 sa

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