Sound Engineers Studied Factors That Might Affect the Output (In

question 105

Multiple Choice

Sound engineers studied factors that might affect the output (in decibels) of a rock concert speaker system. The desired level of significance was ? = .05. The results of their ANOVA tests are shown (some information is missing) . $$\begin{array} { l r r l r l } \hline \text { Source of Variation } & { S S } & { d f } & M S & F & P \text {-value } \\\hline \text { Amplifier } & 99.02344 & & 99.02344 & & 0.005718 \\\text { Position } & 93.98698 & & 31.32899 & 3.215807 & 0.051003 \\\text { Interaction } & 10.15365 & 3 & 3.384549 & 0.347412 & 0.791505 \\\text { Error } & 155.875 & 16 & 9.742188 & & \\\text { Total } & 359.0391 & 23 & & & \\\hline\end{array}$$ The most reasonable conclusion at ? = .05 about the three sources of variation (amplifier, position, and interaction) would be that their effects are:

• A)significant, significant, insignificant.
• B)insignificant, significant, significant.
• C)very significant, almost significant, insignificant.

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