document.write( "Question 1058592: A sample of 230 observations is selected from a normal population for which the population standard deviation is known to be 26. The sample mean is 18. \n" );
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document.write( "a. \n" );
document.write( "Determine the standard error of the mean. (Round your answer to 3 decimal places.) \n" );
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document.write( " Standard error of the mean: \n" );
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document.write( "b. \n" );
document.write( "Determine the 99% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 3 decimal places.) \n" );
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document.write( " Confidence interval between and \n" );
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