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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)
A 12 ounce bottle of beer has 355 ml. The Random Brewing Company sets its machinery so that the contents of a bottle is normally distributed with a mean of 355.5 ml and a standard deviation of 1 ml. (The contents of a bottle are also independent from..
question past records show that the mean life of a certain brand of batteries used in a digital clock is 305 days.
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