use your own words

corrections by replying to your own post. [Minimum length of responses is given in brackets as number of complete sentences required] Questions: 1. Why are convenience samples not desirable? [1] 2. What is the effect of increasing sample size on the cost of collecting data and the quality of the data collected? [1] 3. What are the differences and similarities between cluster and stratified sampling? [2] 4. Why does simple random sampling require a field (a list of all individuals in the population) and why does the requirement of a field make collecting a simple random sample difficult? [2] 5. Why is variability in sampling (the fact that samples from the same population taken using the same method will often be different) so