Assignment:
Measurement and Evaluation for Health Educators
Instructions: You may use your book to find the appropriate formula.
Calculate Cronbach's alpha where N=500 and p=0.25. Provide your recommendation based on the alpha level obtained.
Calculate Cronbach's alpha where N=75 and p=0.05. Provide your recommendation based on the alpha level obtained.
Calculate Cohen's kappa for Interobserver reliability where Pr(a)=35 and Pr (e)=25. Provide your recommendation based on the kappa level obtained.
Calculate Cohen's kappa for Interobserver reliability where Pr(a)=68 and Pr (e)= 60. Provide your recommendation based on the kappa level obtained.
Calculate the percent agreement where the # of agreements =350 and the # of disagreements =82. Provide your recommendation based on the percent agreement obtained.
Formula
α= Np / [1+ p(N-1)]
§ Components of the formula
α = Cronbach's alpha
N= number of items
P= mean inter-item correlations
§ Interpretation
v Range from 0 to 1
v Higher the value, the stronger the internal consistency
v Acceptable minimum 0.70