You work for a marketing firm that has a large client in the automobile industry. You have been asked to estimate the proportion of households in Chicago that have two or more vehicles. You have been assigned to gather a random sample that could be used to estimate this proportion to within a ELDIE margin of error at a 9(195 level of confidence. a} With no prior research, what sample size should you gather in order to obtain a [1.02 margin of error? Round your answer up to the nearest whole number. n = I I households b] 'r'our firm has decided that your plan is too expensive, and they 1wish to reduce the sample size required. You conduct a small preliminary sample, and you obtain a sample proportion of f} = [LLB . Using this new information. what sample size should you gather in order to obtain a ill margin of error? Round your answer up to the nearest whole number. n = I I households