MS 150 Statistics Quiz 04.4 • • Name:

United 787 in delivery livery
Data retrieved from United.com for a one way flight booked for 01 June 2014 originating at Chicago's O'Hare airport (ORD for "Orchard Airfield, the original name of the airport). Quotes obtained on 18 February 2014

FromToDistance (km)Price ($)
ORDIAH1500247
ORDLAX2800169
ORDHNL6900524
ORDMAJ108001575
ORDPNI123001588
  1. _________ Calculate the sample size n.
  2. ______________ Calculate the slope of the linear regression trend line for the data. Keep at least three or four decimal places. Avoid rounding.
  3. ______________ Calculate the y-intercept of the linear regression for the data. Include the sign.
  4. ______________ Is the relationship positive, negative, or neutral?
  5. ______________ Calculate the correlation coefficient r for the data.
  6. ______________ Is the correlation none, weak/low, moderate, strong/high, or perfect?
  7. ______________ Determine the coefficient of determination r².
  8. ______________ What percent in the variation in the distance accounts for the variation in the price?
  9. ______________ Use the slope and intercept to predict the price for a distance of 5000 kilometers.
  10. ______________ Use the slope and intercept to predict the distance for a price of $1100.
  11. ______________ Does the data indicate that the relationship is linear?