TABLE 11-11
a Student Team in a Business Statistics Course

question 11

True/False

TABLE 11-11
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.
$$\begin{array} { l c c c r } & { \text { Brand of Bubblegum } } \\\hline \text { Student } & \text { A } & \text { B } & \text { C } & \text { D } \\\hline \text { Kyle } & 8.75 & 9.50 & 8.50 & 11.50 \\\text { Sarah } & 9.50 & 4.00 & 8.50 & 11.00 \\\text { Leigh } & 9.25 & 5.50 & 7.50 & 7.50 \\\text { Isaac } & 9.50 & 8.50 & 7.50 & 7.50\end{array}$$
-Referring to Table 11-11, the null hypothesis for the F test for the block effects should be rejected at a 0.05 level of significance.

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Definitions:

Decay

The process of losing information over time due to the non-use of a memory trace in the brain.

Interference

The act of impeding or obstructing something, often used in contexts such as memory interference, where one memory competes with or replaces another.

Chunking

A cognitive strategy for organizing information into more manageable parts or chunks to enhance memory and recall.

Von Restorff Effect

A principle from cognitive psychology which posits that an item that stands out from its peers is more likely to be remembered.