stationary

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If the calculated value of DF test statistics is lower than critical value from relevant tables for a given size of sample n, we must make a decision to reject the null hypothesis on the existence of a unit root and accept the alternative hypothesis which claims stationariness of series [x.
Because of the stationariness of the signal, a 30-sec window for the temporal series was used to calculate the RMSSD index for each window formed (RMSSD30s), as proposed by Goldberger et al.
Not only are renunciants to find a paradigm in certain characteristics of plants and trees (as they might also in the steadiness of a rock, or in the adaptability of water, for example), but plants and trees themselves have an attribute which can suggest the achievement of a certain state--their stationariness as living beings.