Question

Morning for z-score:
evening flight Z score :​

Answer 1

See below

Explanation:

Morning flight mean 15 minutes SD = 5

30 minutes late would be 15/5 = 3 SD below the mean

z = 3

Evening mean 20 minutes being 10 more minutes late = 10/3 =3.33 below the mean

z score = 3.33

evening is more late than the AM