Why Use This Data Source In Your Models?
Weather is utilized in order to provide a measure of behavioral changes based on variations. This can include both severe weather as well as overall shifts in weather as a dynamic form of seasonality.
The data shows auto correlation and a non-normal distribution. The data should be differenced. While the Untransformed transformation, provides the best normality, the Square Root variable will also perform well.
Data is able to be distributed by time but not by geography. The roll up method used is Weighted Average.
Data shows auto correlation indicating a need for differencing
The ACF indicates 1 order differencing is appropriate.
Further differencing is reccommended
The Kwiatkowski-Phillips-Schmidt-Shin (KPSS) test, KPSS Trend = 0.23 p-value = 0.01 indicates that the data is not stationary.
The Shapiro-Wilk test returned W = 0.43 with a p-value =0.00 indicating the data does not follow a normal distribution.
A skewness score of 3.22 indicates the data are substantially skewed.
Hartigan's dip test score of 0.02 with a p-value of 0.00 inidcates the data is multimodal
Auto Correlation Function
Auto Correlation Function After Differencing
Partial Auto Correlation Function
Seasonal and Trend Decompostion
Some weather stations, such as the State of Delaware, do not report as frequently as others.
Menne, M.J., I. Durre, B. Korzeniewski, S. McNeal, K. Thomas, X. Yin, S. Anthony, R. Ray, R.S. Vose, B.E.Gleason, and T.G. Houston, 2012: Global Historical Climatology Network - Daily (GHCN-Daily), Version 3.27; NOAA National Climatic Data Center. http://doi.org/10.7289/V5D21VHZ [access date].
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