A rigorous test has been designed for metal compounds This t

A rigorous test has been designed for metal compounds. This test increases the rate of oxidation of these metals in order to represent years of exposure to weather. Four different metal compounds are under consideration for manufacturing a machine component, and each will be tested for oxidation. (This type of situation occurs often, but it doesn\'t fit perfectly into our ideal situation where experimental units are randomly assigned to different treatments. We actually can\'t \"treat\" the units since the treatments are built into the units. One might even question if this is a true experiment. Certainly, it is a comparative study.)

a) What are the treatments in this study?

b) What is the response variable?

c) If we have 5 samples of each metal compound, how many experimental units do we have total?

Solution

a) Treatments in this study

Here treatments are oxidation of these metals.

b) Response variable

Response variable is a four different metal compounds on which we have to apply a treatment (Oxidation)

c) If we have 5 samples of each metal compound then total experimental units are 5*4 = 20

Where there are 4 different metals and each metal has 5 samples.