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.
This compact, evergreen shrub is a popular choice for borders and patio containers, where plants will provide colour and interest all year round. Skimmia japonica âRubella' is a male clone bearing rosettes of glossy, aromatic leaves.The evergreen foliage is punctuated by red buds through the winter, with an explosion of potent, fragrant white blossoms appearing by spring.kimmia japonica âRubella' is a male clone bearing rosettes of glossy, aromatic leaves. The evergreen foliage is punctuated by red buds through the winter, with an explosion of potent, fragrant white blossoms appearing by spring.