Substitute appropriate estimates for the unknown quantities in the expression for the variance of a periodogram estimate of frequency in Equation (526c) to determine roughly whether the...

Substitute appropriate estimates for the unknown quantities in the expression for the variance of a periodogram estimate of frequency in Equation (526c) to determine roughly whether the periodogram-based estimated frequencies fˆ 1 . = 1.00319 cycles/year and fˆ 2 . = 2.00339 cycles/year for the Willamette River data include – within their two standard deviation limits – the values 1 cycle/year and 2 cycles/year (see Table 570 and the discussion surrounding it). Are the corresponding AR(p) estimates in Table 578 also within these two standard deviation limits?