As Marketing Manager for a Very Large Discount Building Supply,you

question 117

Short Answer

As marketing manager for a very large discount building supply,you wish to know what proportion of your city's population conducted do-it-yourself home improvement projects during the past year.The national percentage is 62%; therefore,you decide to use this value in estimating sample size for a study to achieve 90% confidence with the estimate no more than 5% from the true proportion.If you know that the total city population is 30,000,what is the appropriate sample size?