There are 230 welders employed at the Weller Shipyards Corporation. A sample of 34 welders revealed that 17 had graduated from a registered welding course. Construct the 99% confidence interval for the proportion of all welders who graduated from a registered welding course. (Round the final answers to 3 decimal places.) The confidence interval is between 0.279 0.279 Incorrect and 0.721 0.721 Incorrect .