For the following MA (3) process y t = μ + Ε t + θ 1 Ε t -1 + θ 2 Ε t -2 + θ 3 Ε t -3 , where σ t is a zero mean white noise process with variance σ 2
MA(q) process only has memory of length q. This means that all of the autocorrelation coefficients will have a value of zero beyond lag q. This can be seen by examining the MA equation, and seeing that only the past q disturbance terms enter into the equation, so that if we iterate this equation forward through time by more than q periods, the current value of the disturbance term will no longer affect y. Finally, since the autocorrelation function at lag zero is the correlation of y at time t with y at time t (i.e. the correlation of y_t with itself), it must be one by definition.
A crop sown with another crop to gain some advantage in yield are termed as
A situation when the rainfall deficiency is 25% or more of long term average, it is classified as
When rain falls on any material on ground having subfreezing temperatures and freezes into sheet or coating ice then it is known as:
The minimum isolation distance for production of certified seed of composite Maize is -
Which of the following chemical is used to break the dormancy of potato seeds?
Saline soils can be improved by –
According to Planning commission, Indian region is divided into how many agro climatic zones?
As per ISFR, 2021, what is the total forest cover in total geographical area of the country.
Which of the following is a constituent element of chlorophyll ?
Gully erosion is an advance stage of ?