Sample size was estimated using the modified Kish Leslie (1965) survey sampling formula with a 95% confidence interval, a precision of 5%, an estimated proportion of male partners attending ANC of 18.4% and a conservative design effect of 1.5 to cater for intra-cluster variability[ 23].
For these surveys, the formula becomes: where the b subscript in F ib indicates that for married respondents marital and extramarital sex were included separately.
As reported for a previous Canadian survey (Gruskin 1991), formula stored in glass bottles had higher concentrations of Al than the same formula stored in metal cans (Table 4).
Sample size determined to the official survey follows the formula SEWTP = σ/n 1/2. 1 USD = 21,110 VND at the date of 26/09/2013.
For a certain survey of such formulas, see ([Richter 2012]).
After recording the user's perception of distances through surveys, the above formula is utilized to obtain the personalized distance function.
For each plot, we measured the change in adjusted species richness between two surveys
Firstly, we were not able to evaluate the risk of infection from non-working environment as mentioned above, although the prevalence of TB infection could be estimated roughly from the annual risk of TB infection based on the TST surveys using a formula recommended elsewhere [29].
The survey revealed that infant formula donations had contributed to a two-fold increase in formula consumption among children under-two and, consequently, a six-fold increase in rates of diarrhoea among these children.
Alongside such revelations, the survey also contains the formula for the perfect fry-up (two pieces of bacon, one fried egg, one hash brown, two sausages, beans, tomato, toast).
