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A random sample of 12 mid-sized cars tested for fuel consumption gave a mean of 11 km per litre with a standard deviation of 2.2
A random sample of 12 mid-sized cars tested for fuel consumption gave a mean of 11 km per litre with a standard deviation of 2.2 km per litre. Which of the following is the correct 99% confidence interval estimate for the population mean, u. (Pick right answer) O(B) 1131772 O(C) 11 + 2.372 O (A) 11 + 1.972
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