Tip 1: How to analyze charts
The graph can be linear, in the form of bars and so-called "candlesticks". The most popular and most often used are line charts, when one time reference corresponds to a single quantitative indicator. For most analytical calculations that is enough. For such a chart, you'll need the indicators to specific time intervals. For example, sales for each day. Analyze graphics better for several years to identify General trends.
Compare several schedules for the year. Depending on what is the object of the study, determine how the parameters change depending on the season. For example, sales volumes of soft drinks in the summer months greatly increase. The same applies to finishing materials, as the repair of apartments, the population is also produced in the warm season. Such seasonal fluctuations will allow the adjustment of the supply of goods to the warehouse so that there were neither glut nor shortage.
Analyzing the daily chart, you will notice not only seasonal fluctuations of demand. If his line is sawtooth, then take a look at which days of the week have peaks in sales. Most likely, this Saturday and Sunday. Such predictable periodic highs in consumer activity will also help you to incorporate it into their store.
If you collect data for each type of goods, you can explore the graphs trend upward or downward trend, covering the fluctuation of the demand for the product for a long time. The trend is characterized by a sequence of highs and lows, but an upward trend each successive pair of high and low is located above the previous one. The trend will help you to determine the popularity of a product is growing, and some declining.
With the concept of "schedule" any person faces constantly. At all on hearing: the graph of the function, the schedule of the train, the schedule of sales and chart temperature change. They are not only learners change in quantitative indicators over time. This is a convenient form of presenting information, which is used in many different areas of everyday human activities.
It is known that the most readable is a graphical form of data presentation. In its essence, a chart is displayed change one of the parameters depending on change of the other. So, in mathematics, the graph of the trigonometric function displays its value depending on the angle change in the statistics is the display of quantitative indicators for certain periods for some time.
Built according to observations and measurements a graph representing a curve allows glance to understand how changes of the indicators over time, to analyse them and make predictions about how a particular process will develop in the future, to identify trends of this development, its conditions and prerequisites. To build a graph using a rectangular coordinate system. The abscissa shows are postponed usually fixed values, such as time, with a certain equal interval scale. The ordinate is the measured or calculated value of the function.
Graphics are very popular among statisticians and financiers. These time series are used for cost-benefit analysis of the huge amount of securities, forecast price changes and inflation. Having data on the value of securities or the price of a specific set of products – the consumer basket for a fixed period of time, professionals can analyse them and predict the increase or rise in prices, inflation.
When plotting, select the length of time that will be displayed on them, depends on the compactness of the data. Data can be obtained several times a day, daily, weekly and monthly. The smaller the interval between measurements, the more detailed and accurate the graph is. But at the same time, the more compressed the data on the chart, the greater the amount of information you can reflect on it.