District

2004-2005

2014-2015

2016-2017

2019-2020

West

25.31

62.53

37.02

32.03

Midwest

30.51

58.93

26.74

22.92

South

36.14

67.67

51.14

43.62

Northeast

30.63

67.64

47.08

43.60

df

47

47

55

43

F critical

2.82

2.82

2.78

2.84

p value

1.10E−05

9.15E−05

2.77E−06

2.28E−05