Approximations of Time Series

Figure 3

The upper graphs represent 𝑍_𝑡 (thin line), the accidents (in thousands) per month for all drivers, and the approximation 𝑄^0𝑡 (thick line). The RMS value of the remainder 𝑅^1𝑡 is 1.83. The lower graphs include the second approximation 𝑄^1𝑡 (thick line) and the remainder 𝑅^1𝑡 (thin line).