Singh, Housila; Espejo, Mariano Ruiz - In: Journal of Applied Statistics 34 (2007) 1, pp. 71-85
It is well known that two-phase (or double) sampling is of significant use in practice when the population parameter(s) (say, population mean X-super-¯) of the auxiliary variate x is not known. Keeping this in view, we have suggested a class of ratio-product estimators in two-phase sampling...