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

question 6

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 relative efficiency means that 1.0144 times as many observations in each brand would be needed in a one-way ANOVA design as compared to the randomized block design in order to obtain the same precision for comparison of the different means.

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Definitions:

Total Resistance

The combined resistance of all components in a series or parallel electrical circuit that affects the flow of electrical current.

Total Current Flow

The sum of all electric currents flowing through a circuit or component, representing the complete flow of electric charge.

Parallel Circuit

An electrical circuit in which the components are connected so that the same voltage is applied to each component.

Resistance To Flow

In the context of electricity, it refers to the opposition that a material presents to the passage of electric current, typically called electrical resistance.