Refer to the following partial ANOVA results from Excel (some information is missing). $$\begin{array} { | l | c | c | c | c | }
\hline \text { Source of Variation } & S S & d f & M S & F \
\hline \text { Nozzle setting } & 3.46722 & 1 & 3.46722 & 4.87198 \
\hline \text { Pressure level } & 8.07444 & & 4.03722 & 5.67291 \
\hline \text { Interaction } & 2.80779 & 2 & 1.40389 & 1.97268 \
\hline \text { Error } & 8.54000 & & 0.711667 & \
\hline \text { Total } & 22.8894 & & & \
\hline
\end{array}$$ How many nozzle settings were observed?
A)3
B)2
C)1
D)Can't tell.

Question

Refer to the following partial ANOVA results from Excel (some information is missing). $$\begin{array} { | l | c | c | c | c | } 
\hline \text { Source of Variation } & S S & d f & M S & F \
\hline \text { Nozzle setting } & 3.46722 & 1 & 3.46722 & 4.87198 \
\hline \text { Pressure level } & 8.07444 & & 4.03722 & 5.67291 \
\hline \text { Interaction } & 2.80779 & 2 & 1.40389 & 1.97268 \
\hline \text { Error } & 8.54000 & & 0.711667 & \
\hline \text { Total } & 22.8894 & & & \
\hline
\end{array}$$ How many nozzle settings were observed?
A)3
B)2
C)1
D)Can't tell.

Quizplus · Accepted Answer

The ANOVA table only reports one degree of freedom for "Nozzle setting," indicating that only one factor was manipulated. Therefore, there were only two nozzle settings observed.

Refer to the Following Partial ANOVA Results from Excel (Some