Question: USING MINITAB. A researcher is interested in determining the effect of different detergents and water temperatures on a new material. The researcher selected four different

USING MINITAB.

A researcher is interested in determining the effect of different detergents and water temperatures on a new material. The researcher selected four different detergents based on several properties, and conducted a series of experiments at three different water temperatures. Cleanliness was quantified using a construct measure. The code data is shown in the following table.

Detergent

Temperature 1 2 3 4

COLD 7 2 15 11

WARM 12 17 12 18

HOT 14 18 18 19

Answer the following questions based on these results:

1-Is "Temperature" a suitable level differentiator?

2-Calculate the two-way ANOVA.

3-Plot the residuals against fits.

4-Plot the main effects for Temperature.

5-What are your conclusions?

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