In a Completely Randomized Design Involving Four Treatments, the Following

question 4

Multiple Choice

In a completely randomized design involving four treatments, the following information is provided. $\begin{array} { l } & \text {Treatment 1 }& \text {Treatment 2 }& \text {Treatment 3 }& \text {Treatment 4 }\\\hline \text {Sample size }&50&18&15&17\\\text { Sample mean }&32&38&42&48\\\end{array}$
The overall mean (the grand mean) for all treatments is _____.

• A) 40.0
• B) 37.3
• C) 48.0
• D) 37.0
• E) None of the answers is correct.

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Definitions:

Conditioned Stimulus

An initially unimportant stimulus that, following its association with an unconditioned stimulus, comes to evoke a conditioned response.

Unconditioned Stimulus

A stimulus that naturally triggers a response without any prior learning.

Generalization

In psychology, the tendency to respond in the same way to different but similar stimuli; in learning, it's the application of past learning to new situations.

Discrimination

The unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, gender, or disability.