Q5. Appropriate sample size Finally, I am somewhat concerned about time and cost associated with collecting the sample date from the 1470 employees for this survey. For future surveys we intend, we would like to be able to: (a) calculate approximately the average hours worked per week ("HoursPerWeek\"} that is representative of the company to within 0.5hrs, and {h} estimate the proportion of employees that have decided to leave the company each year ("Attrition\") accurately to within 2.5%. Therefore, what is the minimum number of employees we would need to include in next yea r's survey to provide accurate results and satisfy both of these requirements