6 New Assignment 8 limillm wP NWP Assessment Player ui Application Question 8 of 10 /1 V... . -... "..-...y. ... . . '3' -..- The mean time taken to design a house plan by 38 architects was found to be 20 hours with a standard deviation of 3.75 hours a. Construct a 95% condence interval for the population mean/.4. Round your answers to two decimal places. I l to I hours eTextbook and Media b. Suppose the condence interval obtained in part a is too wide. Select all of the ways the width of this interval can be reduced. O Lowering the sample size C] Increasing the sample size C] Increasing the condence level [3 Lowering the condence level eTextbook and Media