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A fever chart is a graphical representation of changing data over time. For example, a fever chart can represent the change in population in a certain region over a period of time, among many other things. The fever chart has several applications in different areas. For example, a marketing professional may try to analyze the sales performance of the company over the last 12 months and compare that with that the 12 months of the preceding year. It is a great tool for identifying patterns, peculiarities and behaviors, among many other things, in data.
A fever chart is also known as a time-series chart.
Fever charts are considered important tools in statistics. When the values of variables are recorded and viewed over a long period of time, it is difficult to derive patterns or trends from plain data. However, when the same data is represented in a fever chart, it becomes easier to spot trends or patterns. For example, weather, business and the growth of insect population all exhibit certain cyclical patterns. In such cases, the variable does not typically exhibit a continuous increase or decrease, but varies depending on the time of the year and other factors such as weather or demand. With a fever chart, it is easy to spot such cyclical patterns.