Instruction: Answer the following question, show your solution and once you get the final answer, interpret it. 1. A random sample of 12 female students in a certain dormitory showed an average weekly expenditure of $8.00 for snack foods, with a standard deviation of $1.75. Construct a 90% confidence interval for the average amount spent each week on snack foods by female students living in this dormitory, assuming the expenditures to be approximately normally distributed.

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