Napačna izbira? Nič za to! Ponujamo možnost vračila v 30 dneh
Z darilnim bonom ne morete zgrešiti. Obdarovanec lahko v zameno za darilni bon izbere karkoli iz naše ponudbe.
30 dni za vračilo blaga
This book deals mainly with: - The different sampling techniques - Sampling methods - The purpose of sampling is to reduce the cost of collecting data on a population by gathering information from a subset instead of the entire population. Sample surveys are often the most feasible way to collect the data needed for program evaluation.