A test engineer wants to estimate the mean gas mileage m (1in miles per gallon) for a particular model of automobile. Eleven of these cars are subjected to a road test, and the gas mileage is computed for each car. A dotplot of the 11 gas-mileage values is roughly symmetrical and has no outliers. The mean and standard deviation of these are 25.5 and 3.01, respectively. Assuming considered a simple random sample of cars of this model, which of the following is a these 11 automobiles can correct statement? 3.01 (A) A 95% confidence interval for m is 25.5 ± 2.228 V11 3.01 (B) A 95% confidence interval for m is 25.5 ± 2.201- V11 3.01 (C) A 95% confidence interval for m is 25.5 ± 2.228 V10 3.01 (D) A 95% confidence interval for m is 25.5 ± 2.201- V10 (E) the results cannot be trusted: the sample is too small

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