a physician with a practice is currently serving 280 patients. The physician would like to administer a survey to his patiena to measyre their satiafaction level with his practice. A random sample of 23 patients had an average aatisfaction score of 7.9 on scale of 1-10. The sample standard deviation was 1.3.

a- Conduct a 99% confidence interval to estimate the average aatisfaction score for the physicians practice.