SCENARIO 11-12 a Student Team in a Business Statistics Course Designed an Designed

question 34

Essay

SCENARIO 11-12
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 Scenario 11-12, what are the degrees of freedom of the randomized block F test for
the difference in the means at a level of significance of 0.01?

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A biological infectious agent that replicates only inside the living cells of an organism, potentially causing disease.

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A device that reads and, in some cases, writes data to a DVD disc, used in computers, entertainment systems, and some recording and playback hardware.

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Hardware components used to enter data or commands into a computer system, such as keyboards, mice, scanners, and touchscreens.