Sound engineers studied factors that might affect the output (in decibels)of a rock concert speaker system.The results of their ANOVA tests are shown (some information is missing). The number of observations per cell was:
A) 1.
B) 2.
C) 3.

Question

Sound engineers studied factors that might affect the output (in decibels)of a rock concert speaker system.The results of their ANOVA tests are shown (some information is missing).  The number of observations per cell was:
A) 1. 
B) 2. 
C) 3.

Quizplus · Accepted Answer

The ANOVA table shows that there are 3 degrees of freedom for error which indicates that there were 4 groups being tested (since the total degrees of freedom is 16). Since the total number of observations was not given, we cannot determine the exact number in each cell. However, we do know that there were at least 4 observations per group in order to conduct the ANOVA. Therefore, the best choice is C, which assumes that there were 3 observations per group (which would give a total of 12 observations) and one observation that could not be assigned to any group.

Sound Engineers Studied Factors That Might Affect the Output (In