Exhibit 13-3
to Test Whether or Not There Is a Difference

question 44

Multiple Choice

Exhibit 13-3
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below.
-Refer to Exhibit 13-3. The null hypothesis for this ANOVA problem is

• A)\(\mu\)₁=\(\mu\)₂
• B)\(\mu\)₁=\(\mu\)₂=\(\mu\)₃
• C)\(\mu\)₁=\(\mu\)₂=\(\mu\)₃=\(\mu\)₄
• D)\(\mu\)₁=\(\mu\)₂= ... =\(\mu\)₁₂

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Definitions:

Cultural Values Theory

The view that people in groups use members’ opinions about the position valued in the wider culture, and then adjust their views in that direction for social approval reasons.

Group Polarisation

The tendency of a group to make decisions that are more extreme than the initial inclination of its members.

Groupthink

A psychological phenomenon that occurs within a group of people, where the desire for harmony or conformity results in an irrational or dysfunctional decision-making outcome.

Risky Shift

Tendency for group discussion to produce group decisions that are more risky than the mean of members’ pre-discussion opinions, but only if the pre-discussion mean already favoured risk.