MEMORANDUM

Descriptive Statistics – Matrix Sample

Sample – What can we learn from the data?

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Item to be AddressedData SourceExample – Airline Arrival Study
What is the name of the data?See the title.Airline Arrival Study
In general, what is the data setSee the first sentence of the file BUGN 280 Excel Project Date File Information document.A random sample of 444 flights from LAX to JKF in New York.
What data is included in the sample?See Variables of Interest worksheet in your data set.In your own words…There are five continuous variables: arrival delay and departure delay in minutes, taxi time from gate to take-off and from landing to gate, and air time.The two categorical variables are the airline carrier and the time of departure – am or pm.
Is any of the data coded? How?See Variables of Interest worksheet in your data set.The name of the carrier: 1 is American, 2 is United.Note: Values for arrival mean early arrivals, 0 = on time, and + values mean later than scheduled.
Where did the data come from?See your data set worksheet tabs.Bureau of Transportation Statistics, US Government
How do you think the data might have been collected?Guess or see source.Flight recorder or flight log
Why do you think the data might have been collected?Guess or see source.Provide information to traveling public on arrival/departure performance against the schedule.
Who is the suggested target of this information?See description file, or look up the information.COO United Airlines
What are the questions the target would like to address or information he/she would like to have?Think about what questions you might be able to answer.What is the range of times or the delays?What is the average delay?Do the delays vary by time of departure?Which airline has the better record?

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