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 0.02 margin of error at a 90% level of confidence. a) with no prior research, what sample size should you gather in order to obtain a 0.02 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. Your conduct a small preliminary sample, and you obtain a sample proportion of p^= 0.18. Using this

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A:

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A: Hypothesis Testing

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