A population has mean u = 21 and standard deviation o =4. Round the answers to two decimal places as needed. Part 1 of 3 V (a) Find the z-score for a population value of 1. The z-score for a population value of 1 is -5 Part: 1 / 3 Part 2 of 3 (b).Find the z-score for a population value of 28. The z-score for a population value of 28 is X Skip Part Check Save For Later Submit Assign Terms of Use Privacy Center | Acce