Asociologist wants to determine the current population of us households that use e-mail. according to a study conducted five years ago, 76% of households were using e-mail. the sociologist would like to find out how many households must be surveyed to be 95% confident (z*-score = 1.96) that the current estimated population proportion is within a 2% margin of error. use the formula n = (1 – ) • . how many households must be surveyed to be 95% confident that the current estimated population proportion is within a 2% margin of error?