chocolate chip cookies were sampled for the grams of at per serving. six brands were tested and the following data was revealed: 8, 8, 10, 7, 9, 9. determine the upper bound of the 90% confidence interval of the population mean of grams of fat in chocolate chip cookies. chocolate chip cookies were sampled for the grams of at per serving. six brands were tested and the following data was revealed: 8, 8, 10, 7, 9, 9. determine the upper bound of the 90% confidence interval of the population mean of grams of fat in chocolate chip cookies.