Snowball sampling is a non-probability sampling technique that is used by researchers to identify potential subjects in studies where subjects are hard to locate.nowball sampling is a non-probability sampling technique that is used by researchers to identify potential subjects in studies where subjects are hard to locate.
In configuration management, a baseline is an agreed description of the attributes of a product, at a point in time, which serves as a basis for defining change. A change is a movement from this baseline state to a next state. The identification of significant changes from the baseline state is the central purpose of baseline identification.
August 27, 2013. By Paul Homewood. As promised, a quick look at what temperature anomalies are and why we use them. A temperature anomaly is the variation between a particular temperature for a particular station and a particular month, and the average for that month for a selected baseline period. These baseline periods are different for each of the four datasets which I present. For instance, HADCRUT use 1961-90 as their baseline. The others are:-.