This learning is completed individually by Rui Zhu.
The dataset used can be found from https://archive.ics.uci.edu/ml/datasets/Beijing+PM2.5+Data
The github repository created can be found from https://github.com/AimerAndern/SS2864GroupProj
5. Variable selection (which variables to keep, based on previous results and AIC, BIC or PRESS test)
####### 6.1 Linearity<br/>
####### 6.2 Normality<br/>
####### 6.3 Equal variance<br/>
####### 6.4 Independence using time series<br/>