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.
Eucalyptus. This fast-growing evergreen tree can be planted in a large space as a stand-alone specimen or kept to smaller proportions using pruning methods such as coppicing or pollarding. The foliage is often used in flower arranging.ucalyptus gunnii AGM: A large evergreen tree with peeling cream and brown bark. The juvenile foliage is bright glaucous-blue and rounded; but the adult leaves elliptic or sickle-shaped and grey-green. Flowers white, in small clusters. Height 25m (80ft).