An Airline Wants to Select a Computer Software Package for Its

question 25

Multiple Choice

An airline wants to select a computer software package for its reservation system. Four software packages (1, 2, 3, and 4) are commercially available. An experiment is set up in which each package is used to make reservations for 5 randomly selected weeks and data on the number of passengers that are bumped over a month are collected. (A total of 20 weeks was included in the experiment.) The variability of the number of passengers that are bumped is found to be roughly the same for the 4 packages. The distribution on the number of passengers that are bumped has been found out to be right-skewed for package 1 and 4, left-skewed for package 2 and normal for package 3. Which of the following tests will be the most appropriate to find out if the mean number of passengers being bumped over a month is the same across the 4 packages?

• A) Paired t test
• B) Pooled-variance t test
• C) One-way ANOVA F test for differences among more than two means
• D) Kruskal-Wallis rank test

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Definitions:

β-D-Glucopyranose

A chemical structure of glucose in its cyclic form, where the glucose molecule forms a six-membered ring, with the hydroxyl group on the first carbon in the beta configuration.

α-D-Ribofuranose

A sugar derivative where the pentose sugar ribose is in its furanose form (a five-membered oxygen-containing ring) and has a specific orientation (alpha) of the hydroxyl group attached to the anomeric carbon.

Epimers

Stereoisomers that differ in configuration at only one stereogenic center among several.

D-Arabinose

A naturally occurring pentose sugar, which is a component of many polysaccharides and glycoproteins.