If you want to be 99% confident of estimating the population mean to within a sampling error of ± 20 and the standard deviation is assumed to be 100, what sample size is required?
Answer to relevant QuestionsIf you want to be 99% confident of estimating the population proportion to within a sampling error of ± 0.04, what sample size is needed? If the inspection division of a county weights and measures department wants to estimate the mean amount of soft- drink fill in 2- liter bottles to within ± 0.01 liter with 95% confidence and also assumes that the standard ...According to a study released by The Financial Brand, an online publication focusing on branding issues and advice affecting retail banks and credit unions, 68% of financial institutions use churn rate (attrition) to gauge ...The human resource (HR) director of a large corporation wishes to study absenteeism among its mid- level managers at its central office during the year. A random sample of 25 mid- level managers reveals the following: • ...A manufacturing company produces steel housings for electrical equipment. The main component part of the housing is a steel trough that is made from a 14- gauge steel coil. It is produced using a 250- ton progressive punch ...
Post your question