Afast food chain advertises that their large bag of french fires has a weight of 150 grams. some high school students, who enjoy french fries at every lunch, suspect that they are getting less than the advertised amount. with a scale borrowed from their physics teacher, they weigh a random sample of 15 bags. what is the conclusion if the sample mean is 145.8 grams and the standard deviation of their sample is 12.81 g? assume all the conditions for inference are met. we will perform the all the steps to test their claim.