Jacksonville is a city in the U.S state of Florida. The settlement in Cowford as earlier known began in the year 1791 and the city received its present name. in 1822 in honor of Andrew Jackson, the first military governor of the Florida Territory. In 1821, Florida became a territory of the United States. The city grew rapidly and was chosen by the voters to consolidate the city and county governments in 1968. Thus Jacksonville was made the largest city in land area in United States. It is now the county seat of Duval County.
First, you have to know a little about statistics. I assume that the grades are drawn from a normal (bell-curve) distribution. These distributions have an average (also called a mean) and a standard deviation (stdev), which measures how wide the distribution spreads out.
Standard deviation is a mathematical tool to help us assess how far the values are spread above and below the mean. A high standard deviation shows that the data is widely spread (less reliable) and a low standard deviation shows that the data are clustered closely around the mean (more reliable).ypothesis: The berries from the tree with yellow & green leaves will be smaller than the berries from a tree with all-green leaves. The difference in mean berry mass between the 2 tree types is 28 mg. The standard deviations are 73 mg and 80 mg.