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.
Incorporate different types of evergreens into your landscape. Evergreen trees and plants provide year-round color and texture to your home landscape. Plant different types of evergreen trees and plants throughout your landscape to create a smooth transition across the entire property between seasonal gardening. Use evergreen trees to shade your home during the summer and block cold winds through the winter.