In a completely randomized design involving four treatments, the following information is provided. The overall mean (the grand mean) for all treatments is
A)40.0
B)37.3
C)48.0
D)37.0

Question

In a completely randomized design involving four treatments, the following information is provided.  The overall mean (the grand mean) for all treatments is
A)40.0 
B)37.3 
C)48.0 
D)37.0

Quizplus · Accepted Answer

Since the mean is not provided for each individual treatment, we must use the overall mean (grand mean) as an estimate for the true population mean. Therefore, the best choice for the overall mean is the sample mean, which is equal to 37.3 (assuming that the sample size is large enough to provide a reliable estimate).

In a Completely Randomized Design Involving Four Treatments, the Following