1 .In research methodology, for example N=4000 and e=0.05. Compute n using Slovin's formula.

2. Students plans to conduct a survey to the workers of mall. If the population of workers in mall is 10,000. Find the sample size if the confidence level is 5%. 3. Suppose that you have a group of 5,500 employees and you want to survey them to find out which tools are best suited to their jobs. You decide that you are happy with a margin of error of 0.05. 4. For instance, in your research, if the population is 90,000 and the margin of error you allow is 5%, what is your representative sample.