Have you ever been frustrated because you could not get a container of some sort to release the last bit of its contents? an article reported on an investigation of this issue for various consumer products. suppose five 6.0 oz tubes of toothpaste of a particular brand are randomly selected and squeezed until no more toothpaste will come out. then each tube is cut open and the amount remaining is weighed, resulting in the following data: 0.52, 0.63, 0.41, 0.5, 0.35. does it appear that the true average amount left is less than 10% of the advertised net contents? (a) check the validity of any assumptions necessary for testing the appropriate hypotheses