step_ahead,prediction
1,6.922663190960884
2,6.9176510006189345
3,6.978207622468472
4,6.917354160547256
5,7.005486975610256
6,7.06453958004713
7,7.087262257933617
8,7.173095878958702
9,7.0330511122941965
10,7.032950364053249
11,7.0987336993217465
12,7.176326751708984
13,7.207957957684994
14,7.122381681203842
15,7.184472669661045