When analysing normally distributed data, standard deviation can be used in conjunction with the mean in order to calculate data intervals. If = mean, S = standard deviation and x = a value in the data set, then. 1  about 68% of the data lie in the interval: . 2  about 95% of the data lie in the interval: + 2S.
Little gem arborvitae (Thuja occidentals 'Little Gem') is an evergreen shrub that keeps its brilliant color and foliage all year long. Growing 1 to 3 feet tall, little gem has medium texture and a slow growth rate. The dense dwarf shrub has a compact form and globose shape.
Growthforms: typical are ground-hugging and other warmth-preserving forms including: 1  tussock-forming graminoids. 2  mats or cushion plants, often evergreen members of the heath family. 3  rosettes. 4  dwarf shrubs, some of which are deciduous in habit.