How much sample size is necessary for the cross sectional study done in school/college level students about their smoking and drinking behaviors?

· Sample size – Prevalence of current tobacco users (po) = 50% = 0.5 – Level of significance (α) = 5% – Z1-α/2 = 1.96 – Margin of error (d) = 5% – Design effect (DE) = 2 – Using formula, Sample...

27 September 2020 8,215 7 View