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.
Dense Spreading Yew. Dense Spreading Yew is a compact evergreen shrub. This yew variety is slow growing. This evergreen can be installed as a stand alone plant or grown into a hedge. Dense Spreading Yew grows well in part shade to full sun areas. Most yew shrubs are resistant to winter burn.his yew variety is slow growing. This evergreen can be installed as a stand alone plant or grown into a hedge. Dense Spreading Yew grows well in part shade to full sun areas. Most yew shrubs are resistant to winter burn.