MANAGEMENT

Detailed explanation-1: -A representative sample is a small subset group that seeks to proportionally reflect specified characteristics exemplified in a target population. Representative samples often yield the best results but they can be the most difficult type of sample to obtain.

Detailed explanation-2: -The minimum sample size is 100 Most statisticians agree that the minimum sample size to get any kind of meaningful result is 100. If your population is less than 100 then you really need to survey all of them.

Detailed explanation-3: -To determine the sample size for small populations, we use the normal approximation to the hypergeometric distribution. The sample size formulas for large (binomial) and small (hypergeometric) populations are shown below. p and q are the population proportions. (If you don’t know what these, are set them each to 0.5.

Detailed explanation-4: -By population we mean the entire set of people who you want to understand (your sample is going to be the people from this population who end up actually taking your survey). So, for example, if you want to understand how to market your toothpaste in France, your population would be residents of France.