The Excel/Mega-Stat output given above summarizes the results of a one-way analysis of variance in an attempt to compare the performance characteristics of four brands of vacuum cleaners.The response variable is the amount of time it takes to clean a specific size room with a specific amount of dirt. What is the total number of observations for all brands of vacuum cleaners (total sample size)?
A)14
B)17
C)18
D)19
E)20

Question

The Excel/Mega-Stat output given above summarizes the results of a one-way analysis of variance in an attempt to compare the performance characteristics of four brands of vacuum cleaners.The response variable is the amount of time it takes to clean a specific size room with a specific amount of dirt. What is the total number of observations for all brands of vacuum cleaners (total sample size)?
A)14 
B)17 
C)18 
D)19 
E)20

Quizplus · Accepted Answer

The total sample size, as shown in the output, is the sum of the sample sizes for each brand, which is 6 + 4 + 4 + 4 = 18 observations. Therefore, the best choice is (C), which is the total sample size.

The Excel/Mega-Stat Output Given Above Summarizes the Results of a One-Way