Marketing companies are interested in knowing the population percent of women who make the majority of household purchasing decisions

Statistics Nov 10, 2020

Marketing companies are interested in knowing the population percent of women who make the majority of household purchasing decisions. When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 95% confident that the population proportion is estimated to within 4 percentage points? A previous study determined that the population proportion is 60 percent.