add prediction standard deviation
add prediction standard deviation

thekingofkings/chicago-crime,thekingofkings/chicago-crime,thekingofkings/chicago-crime,thekingofkings/chicago-crime,thekingofkings/urban-flow-analysis,thekingofkings/urban-flow-analysis,thekingofkings/urban-flow-analysis,thekingofkings/urban-flow-analysis,thekingofkings/urban-flow-analysis,thekingofkings/chicago-crime,thekingofkings/chicago-crime