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A random sample of six cars from a particular model has the following fuel consumption figure, in miles per gallon: 18, 16, 20, 21, 19, 17. Find a 95% confidence interval for the population mean. Assuming that the population is normal. ( use t-distribution for small sample size).

A (16.54, 20.46)

B (14.56, 19.44)

C (16.32, 21.68)

D (15.32, 20.68)

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