How many people should the bureau sample in order to

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The Bureau of Labor Statistics reported that the mean amount spent per year by all American citizens on tobacco products and smoking supplies was $308. The Bureau wants to estimate the mean amount spent on tobacco products by American Latinos. assume the standard deviation is known to be $117. How many people should the Bureau sample in order to estimate the mean amount spent by American Latinos to within $12, if they want to be 90% confident in thier interval?

Reference no: EM13621162

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