The cost of spare parts per machine are normally distributed with a population standard deviation of 158 dollars and an unknown population mean. If a random sample of 23 machines is taken and results in a sample mean of 1790 dollars, find the error bound (EBM) of the confidence interval with a 98% confidence level. Round your answer to THREE decimal places. 20.10 20.05 20.025 20.01 0.005 1.282 1.645 1.960 2.326 2.576