4. Ho: μ = 8.3 Ha: μ# 8.3 The sample mean is 9.2 and the sample size is 50. The population follows a normal distribution with standard deviation 3.10. Use a = 0.05. IMO 5. Ho: μ = 170 Ha: μ> 170 The population is approximately normal. The sample mean is 176, the sample standard deviation is 13.5, and the sample size is 25. Use a = 0.01. H

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