Find the indicated z-score shown in the graph to the right. Area = 1977 Z = 20 The z-score is (Round to two decimal places as needed.) Time Remaining: 02:47:32 Next esc /o C delet 3 A 5 Y O P W E R tab G H K S D caps lock B N M Z X shift nand optionDetermine the minimum sample size required when you want to be 99% confident that the sample mean is within one unit of the population mean and o = 19.7. Assume the population is normally distributed. A 99% confidence level requires a sample size of . (Round up to the nearest whole number as needed.) Time Remaining: 02:46:53 Next Mack DO a88 esc F3 F4 @ FF 2 4 Y U O Q W E R T cab F G H K S DFind the area of the shaded region under the standard normal curve. If convenient, use technology to find the area. -2.35 0 The area of the shaded region is. (Round to four decimal places as needed.) Time Remaining: 02:46:36 Submit test 30 3 4 W E R T U Q K F G H D