In a random sample of 13 senior-level chemical engineers, the mean annual earnings was 121650 and the standard deviation was 34620. Assume the annual earnings are normally distributed and construct a 95% condence interval for the population mean annual earnings for senior-level chemical engineers. 1. The critical value: 0'95 Submit Answer \"Tries 4/5 Previous Tries 2. The standard error of the sample mean: 9601.8604 You are correct. Your receipt no. ls 159-8745 9 W 3. The margin of error: Submit Answer Tries 0/5 4. The lower limit of the interval: Submit Answer Tries 0/5 5. The upper limit of the interval: Submit Answer Tries 0/5