Parameters

Uyo

Benin

Port Harcourt

Warri

Max CUMSUM value

7.00

5

5

7

Critical value at 90% CI

6.68

7.32

7.22

7.32

Critical value at 95% CI

7.45

8.16

8.05

8.16

Critical value at 99% CI

8.93

9.64

9.78

CUSUM Test Dates

2002

2004 &2006

1988

2000

SQMK Test Dates

2011

2005

1994

2002