ul Verizon LTE E mathxl.com C Homework: Section 7-3 HW Score: 0 of 5 pts 4 7 of8 {5 complete) 7 } HW Score: 42.42%. 14 of 33 pts 47-3-33 Question Help '5 The random sample shown below was selected from a normal distribution. 19.7.5.7,1Q. Complete parts a and b. a. Construct a 90% condence interval for the population mean I}. (3.73 . 3.27) (Round to two decimal places as needed.) b. Assume that sample mean 1-! and sample standard deviation 3 remain exactly the same as those you just calculated but that are based on a sample of n = 25 observations. Repeat part a. What is the effect of increasing the sample size on the width of the condence intervals? The condence intenral is (BED . (Round to M0 decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. < m D7