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A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is known to equal 6. The 95% confidence interval for the population mean goes from( ) to ( ). (Round your answers to two decimal places.)

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