Hello, I need help with my statistics assignment. thank you

M L_J l 9 \\l l ii mathxl.com 0). .' Econ 2310: Business Statistics 991 Online Mory Abdoul Kader Karamoko ' | 4/15/18 3:10 PM Chapter 8 RGVieW Quiz SubmitQuiz O A physician with a practice is currently sewing 280 patients. The physician would like to administer a survey to his patients to measure their satisfaction level with his practice. A random sample of 23 patients had an average satisfaction score of 7.9 on a scale of 1-10. The sample standard deviation was 1.8. Complete parts a and b below. a. Construct a 99% condence interval to estimate the average satisfaction score for the physician's practice. The 99% condence interval to estimate the average satisfaction score is . (Round to two decimal places as needed.) b. What assumption needs to be made for this analysis? O A. The population standard deviation is known. 0 B. The sample size is less than 5% of the population. 0 c. The population is normally distributed. 0 D. There are no assumptions needed for this analy s. Click to select your answer(s). @ Save for Later 4 ' P