I need help with questions 1&2

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 answer up to 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 = 0.2 . Using this new information. what sample size should you gather in order to obtain a 0.03 margin of error? Round your answer up to the nearest whole number. households Question Help: Video 1 DVideo 2 Message instructor Submit Question Jump to Answer Question 2 0/4 pts 9 3 99 0 Details A research group needs to determine a 90% confidence interval for the mean repair cost for all car insurance small claims. From past research, it is known that the standard deviation of such claims amounts to $98.77. . If the group wants their estimate to have a maximum error of $19, how many small claims should they sample? Round your answer up to the next integer