TABLE 11-7 a Student Team in a Business Statistics Course Designed an Designed

question 212

True/False

TABLE 11-7
A student team in a business statistics course designed an experiment to investigate whether the brand of bubblegum used affected the size of bubbles they could blow. To reduce the person-to-person variability, the students decided to use a randomized block design using themselves as blocks. Four brands of bubblegum were tested. A student chewed two pieces of a brand of gum and then blew a bubble, attempting to make it as big as possible. Another student measured the diameter of the bubble at its biggest point. The following table gives the diameters of the bubbles (in inches) for the 16 observations.

-Referring to Table 11-7, the randomized block F test is valid only if the population of diameters is normally distributed for the 4 brands.

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Definitions:

Groupthink

A process in which group members are influenced by cohesiveness and a dynamic leader to ignore external realities as they make decisions.

Prejudices

Preconceived opinions or judgments toward people, objects, or situations based on biases, without factual knowledge.

Stereotyping

Erroneous assumptions that all members of a group share the same traits or characteristics.

Attraction-Similarity Hypothesis

A theory suggesting that people are attracted to others who are similar to themselves in terms of attitudes, values, and interests.