# Nursing Preparation Study Guide

Nursing Preparation Study Guide

Chapter 4: Math – Part 2 4.1 Data Interpretation Data plays a very vital role in our day to day life. When the data at hand is small, it is easy to understand, analyze and interpret in order to form substantial decisions. However, in case the data is very large, then it is generally presented in different ways, like data tables, graphs, bar charts, pie charts, scatterplots, histograms etc. In such cases, it is imperative that the user is able to understand and analyze the data precisely. The process of understanding the data from its represented form is known as data interpretation. Now we shall take each of these precise forms and understand how they can be interpreted using some example. 4.1.1 Data Tables Using data tables, data can be represented in a form of tabular representation. Tables can be single or multiple with horizontal rows and vertical columns. The data corresponding to each cell corresponds to its unique row and column. An instance of the data table is given as under: Sale of different models of cars (in ‘million) Year Hyundai General Motors Mercedes Honda 2012 50 76 43 67 2013 54 74 48 73 2014 57 69 55 69 In the above table, we are given the sale of four car models for three consecutive years. From this data table, we can find, analysis, and interpret the following information: Examples • General Motors sold more models in 2012 than any other year • The sale of Hyundai increased by 8% in 2013 as compared to 2012 • Mercedes witnessedmaximum growth of about 14.58% in 2014 as compared to previous year 4.1.2 Histograms Is a common method to graphically represent the frequencies data set. A histogram can be used for a larger data set. For example, if you have a large population and are gathering statistical exam scores from numerous area colleges, you may have 100 students out of 500 who receive a 94 on an exam. That is a large data set and it is not practical to generate a stem-and-leaf plot. Histograms are usually generated using graphing or statistical software. You can also generate them by hand!

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