The Pioneer Valley Planning Commission (PVPC) collected data north of Chestnut Street in Florence, MA for ninety days from April 5, 2005 to November 15, 2005. Data collectors set up a laser sensor, with breaks in the laser beam recording when a rail-trail user passed the data collection station.
data(Riders)A data frame with 90 observations on the following 12 variables.
datedate of data collection (POSIXct)
daya factor with levels Monday, Tuesday, Wednesday,
Thursday, Friday, Saturday, and Sunday.
highThigh temperature for the day (in degrees Fahrenheit)
lowTlow temperature for the day (in degrees Fahrenheit)
hishorter name for highT
loshorter name for lowT
precipinches of precipitation
cloudsmeasure of cloud cover (in oktas)
ridersestimated number of trail crossings that day (number of breaks recorded)
ctshorter name for riders
weekdaytype of day: a factor with levels N (weekend or holiday)
Y (non-holiday weekday)
wdayshorter name for weekday
There is a potential for error when two users trigger the infrared beam at exactly the same time since the counter would only logs one of the crossings. The collectors left the motion detector out during the winter, but because the counter drops data when the temperature falls below 14 degrees Fahrenheit, there are no data for the coldest winter months.
"Rail trails and property values: Is there an association?", Nicholas J. Horton and Ella Hartenian (Journal of Statistics Education, 2015), http://www.amstat.org/publications/jse/v23n2/horton.pdf