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, 17.02.2022 19:25

# An experiment compared the adhesion of 2 types of paint, A and B, to 3 types of metal, 1, 2, and 3, used in automobiles. Thirty sheets of metal were used in the experiment: 10 of Metal 1, 10 of Metal 2, and 10 of Metal 3. Half of each metal type will receive paint A and the other half will receive paint B. The adhesion of the paints was measured, and the measures were compared. How many experimental units are in the experiment?A. 2B.3C. 10D. 30E. 60

There are 30 experimental units in the experiment, which are the 30: the thirty sheets of metal.

Explanation:

This table shows you how the experimental units, sheets of metal, were treated:

Metal 1         Metal 2       Metal 3       Total

Paint A         5                     5               5                15

Paint B         5                     5               5                15

Total            10                   10              10               30

Fifteen sheets (units) were treated with paint A: 5 of metal 1, 5 of metal 2, and 5 of metal 3.

Fifteen sheets (units) were treated with paint B: 5 of metal 1, 5 of metal 2, and 5 of metal 3.

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