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.
CLEYERA 'LEANN' - Ternstroemia gymnanthera 'Contherann' PP11737. This evergreen shrub is a great substitute for disease prone Red Tipped Photinia. Slower growing this shrub has beautiful maroon leaves in Spring that change to green for summer and back to maroon in fall and winter. Best grown in full sun or part shade in well drained acidic soil does not tolerate wet soil.