7-2 Homework: Chapter 8 (Sections 8.1 and ... i Submitted 37.5/50 Total points awarded Help Exit Use the sample information x = 38, 0= 4, n= 11 to calculate the following confidence intervals for / assuming the sample is from a normal population. (a) 90 percent confidence. (Round your answers to 4 decimal places.) 0/5 The 90% confidence interval is from 35.8140 x to 40. 1860 X points awarded Scored eBook Hint (b) 95 percent confidence. (Round your answers to 4 decimal places.) Ask Print The 95% confidence interval is from 35.3128 x to 40.6872 X References (c) 99 percent confidence. (Round your answers to 4 decimal places.) The 99% confidence interval is from 31.3398 x to 40.6602 X Mc