Each car in a sample of seven cars was tested for nitrogen oxide emissions in grams per mile and following results were obtained.

Question Help Each car in a sample of seven cars was tested for nitrogen-oxide emissions (in grams per mile), and the following results were obtained. 0.07, 0.11, 0.17, 0.14, 0.13, 0.08, 0.14 a. Assuming that this sample is representative of cars in use, construct a 95% confidence interval estimate of the mean amount of nitrogen-oxide emissions for all cars.