Oven thermostats were tested by setting them to 350F and measuring the actual temperature of the oven. In a sample of 67 thermostats, the average temperature was 348.2F and the standard deviation was 6.000F. Find a 90% confidence interval for the mean oven temperature. (Round the final answers to three decimal places. The 90% confidence interval is (). The sugar content in a one-cup serving of a certain breakfast cereal was measured for a sample of 155.0 servings. The average was 11.9 g and the standard deviation was 1.1 g. Find a 95% upper confidence bound for the mean sugar content. (Round the final answer to three decimal places. The 95% upper confidence bound is