A logistic growth curve is a sigmoidal, or S-shaped, curve used to map functions of initially gradual increase, rapid increase in the middle growth period and a slow leveling off to a maximum value at the end. Typically, a logistic growth curve will be used to model patterns of biological growth, such as population or ecology.Know More
The exponential, or geometric, growth of populations is rapid at first but always slowed by their environment's carrying capacity, which is the availability of food and other resources. Other factors will also slow population growth, such as predation and disease.
The logistic growth curve has also been used to model the rate of AIDS infection over a period of time. In the United States, the rate of AIDS infection between 1981 and 1992 followed a classic logistic curve, leveling off at around 47,500 cases each year. Since the logistic growth curve dictates that this leveling off occurs at more or less of a maximum value, as with the maximum population permitted by a given environment's carrying capacity, the results of the study could be extrapolated through to 1995. However, researchers point out that only the infection rate can be reliably plotted as a logistic growth curve because the morbidity rate is affected by advances in AIDS medicine and healthcare.Learn more about Data Graphs
The J curve represents population growth with no restrictions, while the S curve represents population growth with a restricting factor. Exponential and logistical are the two modes of measuring population growth.Full Answer >
A cumulative frequency polygon is a plot of the cumulative frequency against the upper class boundary with the points joined by a line segment. An ogive is any continuous cumulative frequency curve, including cumulative frequency polygons. A cumulative frequency polygon displays cumulative frequency on the x-axis and class marks on the y-axis.Full Answer >
A percentage component bar chart shows what the percentage that multiple components reached to make 100 percent of a given value. The bars can be stacked horizontally or vertically depending on the type of look someone wants to give their graph.Full Answer >
A chart or a graph is a pictorial representation of data. Charts and graphs are used to display detailed information and relationships between quantitative data. Examples of charts include bar graphs, pie charts, histograms and time-series graphs.Full Answer >