You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is...


You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately σ=63.3σ=63.3 dollars. You would like to be 95% confident that your estimate is within 2.5 dollar(s) of average spending on the birthday parties. How many parents do you have to sample?


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Jun 01, 2022
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