copy Q20. A clinic in Niigata prefecture offers a weight loss program. The clinic would like to study the average weight loss of all its clients. For this purpose, the clinic took a random sample of 10 clients, and found that the average weight loss is 15.9 Kg, with a sample variance of 28.09. Assume the weight loss of all its clients conforms to normal distribution (9 points) a) Find a 99% confidence interval for the weight loss population mean. b ) Without doing the calculations, explain whether a 90% confidence interval for the weight loss population mean would be wider thanarrower than/the same as that found in a). Notes for Q20: For cut-off points, ME, LCL, UCL etc, you don't need to write down the steps. If your final answers to cut-off points, ME, LCL, UCL are correct, you get the Don full points. However, if you are not sure the final answers are correct or not, write down your computation steps using meaningful notations may help you to get partial points. You can input multiple lines below. 12 of 15 Data Analytics for Business (ITC1050), Final Exam (2021 Fall) Q20. a) The cut-off point (You can input multiple lines here) = Q20. a) ME (Marginal of Error) (You can input multiple lines here) = Q20. a) LCL(Lower confidence Limit) (You can input multiple lines here) = le form! Q20. a) UCL(Upper confidence Limit) (You can input multiple lines here) = ogle Q20. a) The confidence interval and other steps you would like to add here (you can input multiple lines here) Q20. b) A 90% confidence interval for the population mean would be wider thanarrower than/the same as that found in a)