Importance Of Statistics In Statistics

Mary Dodgen
PSY 2003-003
Paper III
November 5, 2017
Statistics is a method of collecting data and using that data to make decisions or draw conclusions. Processes included in statistics are planning, analyzing, managing, making inferences, presenting, and consulting. Statistics are used for decisions in the government, industry, medical field, and education curricula.
It is important for statisticians to understand the population from which they are receiving their data. We use population because they must know what their sampling frame is and how to reach their conclusion. There are many different types of sampling, all looking at different areas of a population. Statisticians need to assure that there is an equal probability among everyone in their sampling frame. Samples are used to make an inference about a specific population, however, statistics are used to estimate a parameter (a number that describes some characteristic of the population). To reduce chance of bias, statisticians should use random sampling, but in order to increase precisions, they must increase their sample

It is much easier for our minds to understand what the graph or chart is representing, than attempting to read a long paragraph explaining the variables. The variables should be labeled on both axis of the graph, allowing the reader to recognize what the study measured. Although pie charts are an option, they are not recommended to use because the eye is not very good at measuring relative areas, however it can judge linear measures much easier. Instead, a bar chart would be simpler to visualize and understand. The data should always start at zero to avoid distorting the data. A bell-curve distribution could be used as a visual tool for summarizing data. If it is a normal distribution, the mean, median, and mode will all be equally