For ice piece 1, place 2 teaspoons of water into one of the spaces in the ice cube tray. to make ice piece 2, place 2 teaspoons of water into the sealable plastic bag. carefully squeeze as much of the air out of the bag as possible without spilling any water. then seal the bag. place the sealed bag on a flat surface in the freezer. place the ice cube tray in the freezer at the same time. leave both in the freezer for four hours.

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.