the answer was incorrect and I need to know the correct answer. the first part of it is correct. I'm posting it all here to see. 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 0.03 margin of error at a 99% level of confidence.

a) With no prior research, what sample size should you gather in order to obtain a 0.03 margin of error? Round your answerup to the nearest whole number.

n = Correct households

b) Your firm has decided that your plan is too expensive, and they wish to reduce the sample size required. You conduct a small preliminary sample, and you obtain a sample proportion ofp=0.18p^=0.18. Using this new information.what sample size should you gather in order to obtain a 0.03 margin of error? Round your answerup to the nearest whole number.

n = Incorrect households answer for part B only! I need part be