Consider an MA(1) process:
x_t = ω_t + θω_t-1,
where θ is a parameter.
(a) Derive a formula for the power spectrum of x_t, expressed in terms of θ and ω.
(b) Use arma. spec() to plot the spectral density of x_t for θ > 0 and for θ < 0 (just select arbitrary values).
(c) How should we interpret the spectra exhibited in part (b)?

this is a very good question

step-by-step explanation:

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how many players are there?

step-by-step explanation:

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870

for future students the answer is b

hope i

-lavira: )