ookmarks Profiles Tab Window Help FSU Pearson Acc X Assignment. X D Do Homewo X Course Hero x + C mylab.pearson.com/Student/PlayerHomework.as... Update STP 231 2022 Spring B 20713 Tran (1) HW Score: Homework: HW 12: Ch Question 1, 7.2.1 43.75%, 7 of 16 7 & 8 - Confidence Part 1 of 4 points Intervals for One Pop Save O Points: 0 of 1 Refer to the technology output given to the right that results from measured hemoglobin levels (g/dL) Tinterval in 100 randomly selected adult females. The confidence level of 90% was used. (13.112,13.484) x = 13.298 a. Express the confidence interval in the format that uses the "less than" symbol. Assume that the Sx = 1.121 original listed data use two decimal places, and round the confidence interval limits accordingly. n = 100 b. Identify the best point estimate of u and the margin of error cu In constructing the confidence interval estimate of u, why is it not necessary to confirm that the sample data appear to be from a population with a normal distribution?