A random sample of 10 observations with a mean of 23 was drawn from a normal population with a population standard deviation of 9. The 99% confidence interval for the population mean is Select one: O 1. (16.562; 29.438) O2. (17.422; 28.578) O 3. (15.657; 30.343) O4. (16.652; 29.384) 5. (23.00; 46.820)

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