Mathematics, 21.05.2020 22:13 nborowy9579

Can someone explain how to do this

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=44.1dollars. You would like to be 90% confident that your estimate is within 1 dollar(s) of average spending on the birthday parties. How many parents do you have to sample?

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Can someone explain how to do this

You want to obtain a sample to estimate how much par...