What was the average (mean) departure delay (to the nearest minute) for flights operated by American Airlines (AA) in 2013, and was this better or worse than the average for all airlines?

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Question restatement: What was the average (mean) departure delay (to the nearest minute) for flights operated by American Airlines (AA) in 2013, and was this better or worse than the average for all airlines? Answer options: 1) 9 minutes, better. 2) 13 minutes, worse. 3) 13 minutes, the same. 4) 13 minutes, better. 5) 9 minutes, worse.

Option 1: '9 minutes, better.' This option claims that AA’s average departure delay in 2013 was 9 minutes and that this was better than the overall average for all airlines. If the data show a 9-minute mean delay and the national or industry average was higher than 9, this would indeed indicate an improvement relative to peers, which would make this statement true.

Option 2: '13 minutes, worse.' This would assert that AA’s mean departure delay was 13 minutes and that this was worse than the overall average for all airlines. If the actual AA figure is not 13 minutes, or if 13 minutes did not surpass the overall average, this would be inaccurate. Also, the word 'worse' depends on comparing to the all-airlines average; if the national average were higher than 13, this would not be worse, so the claim could be incorrect on both the numeric and comparative parts.

Option 3: '13 minutes, the same.' Here the claim is a 13-minute mean and that it equals the all-airlines average. Any discrepancy between AA’s actual mean and 13 minutes would render this false, and even if the mean were 13, it would require that the industry average be exactly 13 to be accurate; any mismatch would make this incorrect.

Option 4: '13 minutes, better.' This states a 13-minute mean with a result better than the all-airlines average. If the industry average were higher than 13, this could be possible; however, typically a longer delay (13 minutes) would be more likely to be worse rather than better unless the overall average was even worse, so this pairing is less plausible unless data strongly support it.

Option 5: '9 minutes, worse.' This option flips the comparative judgment to worse. If AA’s delay was 9 minutes but the industry average was higher than 9, the statement would be inconsistent because a shorter delay would usually be considered better, not worse. Therefore, this option would be incorrect under standard interpretation of 'better' vs 'worse' in delays.

Broad reasoning across options: The key aspects are the numeric mean delay for AA in 2013 and the comparison to the all-airlines average. The statements that pair 9 minutes with either 'better' or 'worse' hinge on whether AA’s performance beat or failed to meet the broader average. The statements that pair 13 minutes with any comparative term require that the industry average align in a particular way (higher, lower, or exactly equal to 13), which would need the actual data to verify. In most data contexts about airline delays, a 9-minute mean would typically be framed as better than the broader average if the overall average exceeded 9 minutes; a 13-minute mean would more commonly be worse unless the industry average was significantly higher than 13. Therefore, the option that states a 9-minute mean with a better-than-average comparison tracks with a plausible data interpretation, while the other options either misstate the mean or mischaracterize the comparative result.

Summary per option:
- Option 1 (9 minutes, better): Aligns with a scenario where AA’s mean delay is 9 minutes and this beats the industry average. This is coherent and plausible given typical delay patterns.
- Option 2 (13 minutes, worse): Requires AA to have a 13-minute mean and a higher-than-13 industry average; this is less consistent with the most common delay distributions and would depend on the actual data.
- Option 3 (13 minutes, the same): Demands exact equality to the industry average; unless the data show a perfect match at 13 minutes, this is unlikely and thus incorrect.
- Option 4 (13 minutes, better): Requires the industry average to be even higher than 13, which is possible but less common; without data supporting such a high baseline, this is dubious.
- Option 5 (9 minutes, worse): Premised on a paradoxical comparison where a shorter delay is labeled worse, which contradicts standard interpretation of speedier departures being better.

Based on typical interpretation of airline departure-delay metrics and how such questions are structured to have a unique correct choice, option 1 stands as the most consistent pairing of a 9-minute mean with a favorable comparison to the all-airlines average.

BUSI_V 335 972 2025SS MT2 Practice Exam - Airports

What was the average (mean) departure delay (to the nearest minute) for flights operated by American Airlines (AA) in 2013, and was this better or worse than the average for all airlines?

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