Descriptive and Inferential Statistics
The world of science would find itself lost without research. Research alone however, oftentimes will not answer the questions or solve the problems that scientists set out to solve. Statistics is where research becomes applied and scientists can make educated guesses about future outcomes. “Formally, statistics is a branch of mathematics that focuses on organization, analysis, and interpretation of a group of numbers” (Aron, Aron, and Coups, 2006). There are two main branches of statistics that we will explore; descriptive and inferential statistics. The main relationship between descriptive and inferential statistics is that they all include numbers from either actual given information or inferred assumptions that try to draw a conclusion or complete given data. Descriptive Statistics
Descriptive statistics is a method of research used by psychologists. Descriptive statistics make statistics understandable and describes a group of numbers for a research study (Aron, Aron and Coups,2006). Descriptive statistics are used in summarizing large sets of quantitative or numerical information. If there is a large amount of information for measurement, the best way to show the information is by a graph (Boerre, 2005). Descriptive statistics provide a simple summary about the sample and the measurements. Descriptive statistics describes the data; it allows the researcher to understand a large amount of numbers or data in a simple way (Social Research, 2009). Central tendency refers to the idea that one number can summarize the entire set of measurement. This is a number that is in some way central to the set (Boerre, 2005). The mode is the measurement that has been found to be the most frequent. Although the mode, or greatest frequency number, is not used very often, it is useful when differences are rare or non-numerical (Boerre, 2005). The median is the number which is half of the measurement, or midpointof the...
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