A health insurer gathers data on the length of hospitalization (in days) of patients operated on for appendicitis. Random samples from two different hospitals yielded the following results. Hospital 1: n = 56, mean = 4.2, and standard deviation = 1.6. Hospital 2: n = 38, mean = 5.4 and standard deviation = 1.9. Find a 90% confidence interval for the difference in mean length of stays for the two hospitals and interpret the result.
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