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 0.015 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 0.015 margin of error? Round your answerupto the nearest whole number.

n =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 of

p

=

0.235

p^=0.235

. Using this new information.what sample size should you gather in order to obtain a 0.015 margin of error? Round your answerupto the nearest whole number.

n =households