Delta Air Lines Wants to Determine If the Number of No-Shows

question 38

Multiple Choice

Delta Air Lines wants to determine if the number of no-shows for flights originating from Detroit are higher than from Minneapolis.A sample of 20 flights from each city is taken and the number of no-shows is determined for each flight.Which nonparametric test would you use to determine whether the number of no-shows is greater in Detroit?

• A) Wald-Wolfowitz one-sample runs test
• B) Wilcoxon signed-rank test
• C) Wilcoxon rank sum (Mann-Whitney)test
• D) Kruskal-Wallis test

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Definitions:

Histogram

A graphical representation of the distribution of numerical data, where the data are binned into ranges and each bin is represented by a bar with its height proportional to the frequency of data points in the bin.

Vertical Line

A line that runs up and down the page, having an undefined slope and typically used to represent the concept of infinity in coordinate geometry.

Histogram

A graphical representation that displays data by way of bars to show the frequency of numerical data intervals.

Symmetric

Having attributes that are mirrored equally across a central axis or around a central point.