sample sizes in double sampling, which for the first sample, the cumulative sample size corresponds to the sample size of the first sample, where for the second sample, it corresponds to the sum of the sample sizes of the first and the second samples, suurus, mis tekib kahekordse valimi korral, kus esimese valimi korral on see võrdne selle valimikogusega ja teise valimi puhul vastab see esimese ja teise valimikoguste summale