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Willingness to pay for improved drinking water facility in Samsani Khui, Johar Town, Lahore, Pakistan. AAES 2017, 2, 187–193. [Google Scholar] Guilfoos, T.; Hayden, S.; Uchida, E.; Oyanedel-Craver, V. WTP for water filters and water quality testing services in Guatemala. Water ...
Reliability Check To validate the reliability of the responses in the questionnaire, we used a statistical measure of confidence consistency, namely Cronbach's alpha coefficient, for a given sample. The coefficient formula is according to Equation (3), as indicated in [79]. α = K K − 1 ...