Severe acute respiratory syndrome (SARS) is a viral respiratory illness. It has the distinction of being the ﬁrst new communicable disease of the 21st century. Based on interviews with 81 SARS patients, researchers found that the mean incubation period was 4.6 days, with a standard deviation of 15.9 days. Based on this information, construct a 95% conﬁdence interval for the mean incubation period of the SARS virus. Interpret the interval.
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