Category of source

Misungwi

Magu

Lamadi

All

Chi-square value

Improved source

147 (87.0)

90 (74.4)

85 (66.9)

322 (77.2)

χ² = 17.356

df = 2

p = 0.000

Unimproved source

22 (13.0)

31 (25.6)

42 (33.1)

95 (22.8)