2. Ho: = 7.5 Ha: > 7.5 The sample mean is 8.3 and the sample size is 52. The population follows a normal distribution with standard deviation 3.17. Use a = 0.01. 3. Ho: = 15 Hau< 15 The sample mean is 10, the sample standard deviation is 6.1, and the sample size is 9. Use a= 0.05. 4. Ho: p=116.12 Hau> 116.12 The population follows a normal distribution with standard deviation of 7.18, sample mean of 118.7, and sample size of 21. Use a = 0.10.

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