It has been determined that an individual belonging to a particular age group spends on average $1873 on restaurants and carry out food. Suppose this estimate is based on a sample of 80 individuals, with standard deviation of $550. At 95% confidence, what is the margin of error? Find the 95% confidence interval for the population mean. If the population consists in 92 million individuals, how many would you estimate would spend а. b. с. more than $3000 on restaurants and take out food?

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