A nationally distributed college newspaper conducts a survey among students nationwide every year. This year, responses from a simple random sample of 204 college students to the question "About how many DVDs do you own?" resulted in a sample mean of x = 72.8. Based on data from previous years, the editors of the newspaper assume that o = 7.2. Use the information given to obtain a 95% confidence interval for the mean number of DVDs owned by all college students. (65.6, 80.0) (71.8, 73.8) (72.0, 73.6) (72.3, 73.3)

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