Sample Size Assignment Calculate the proper sample size for each of the following situations. Be sure to show all of your work. 1. A bookstore would like to know the percentage of adults that live in the neighborhood that the bookstore is in who read 2 or more novels a month. A previous study found this percentage to be 30%. Management's best guess at the size of the population is 8,000 and would like a sample size with allowable error of + 5% using a 95% confidence interval. 2. The same bookstore is also interested in determining the percentage of adults that would find the installation of a coffee shop in the bookstore attractive. The results of a survey conducted by a competitor store found this number to be 60%. Once again, management is interested in the proper sample size with an allowable error of + 5% and a population size of 8,000. However, they would like to use a 99% confidence interval. 3. A restaurant manager wants to know the percentage of people in his town who eat out at least once a week. The town's population is 10,000 and the manager would like a sample size with an allowable error of 5%, using a 95% confidence interval. 4. The Department of Highways would like to know the average amount of time town of Edgefield commuters (population = 6,000) spend each week traveling two and from their places of employment. A pilot study indicated a mean of 210 minutes and a standard deviation of 30 minutes. They are willing to accept error of five minutes and would like to use a 95% confidence interval. 5. The department of highways would also like to know the amount of gasoline (in litres) that county of Edgefield commuters (population 40,000) typically use in a year. The acceptable level of error is + 5 litres and the department would like to use a confidence interval of 99%. Past studies indicated an average of 1,560 litres with a variance of 8,100