Approximations of Time Series

Figure 1

The upper graphs include 𝑍_𝑡 (thin line), the accidents per month for young novice drivers, and the approximation 𝑄^0𝑡 (thick line). The lower graphs represent the remainder 𝑅^1𝑡=𝑍_𝑡−𝑄^0𝑡 (thin line) and the amplitude of the remainder 𝐴^1𝑡 (thick line). The RMS value of the remainder is 25.