Lighting
a Study to Examine the Effect of Lighting Type

Lighting
A study to examine the effect of lighting type and assembly method on the productivity of workers on a production line for electronic circuit boards produced the following results: $$\begin{array}{l}\text { Lighting (B) }\\\begin{array} { | c | c c | c | } \hline \begin{array} { c } \text { Assembly } \\\text { Method } ( \text { A } )\end{array} & \text { Fluorescent } & \text { Incandescent } & \text { Means } \\\hline 1 & 49,32 & 42,45 & 42 \\2 & 37,30 & 45,32 & 36 \\\hline \text { Means } & 37 & 41 & 39 \text { Grand Mean } \\\hline\end{array}\end{array}$$
-What are the total degrees of freedom for this experiment?

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