# Nursing Preparation Study Guide

Nursing Preparation Study Guide Now we have three students who are 31 and three who are 33. Therefore we have two modes and we would say that the mode of our population is 31 and 33. Remember, you can always have more than one mode if two sets of numbers appear an equal time in a given data set. Example Look at the following dataset. 28, 30, 31, 33, 35, 36, 37, 42 In this example, there are no repeating ages. Therefore, this data set does not have a mode. A data set can only have a mode when repeating numbers are observed. *Points to remember about mode: A d ta set can have 1 mod , more than 1 mode or no modes! 4.2.4 Range The range is the interval between the lowest and highest values, of a given number set place in numerical order. The range can give us useful information about a given population or data set. Example Let’s look at our original data set: 31, 33, 30, 31, 35, 33, 36, 28, 42, 37, 33 • Step 1: Order the data set, just like we did previously. This allows you to better visualize and identify the lowest and highest values 28, 30, 31, 31, 33, 33, 33, 35, 36, 37, 42 From the above example, we can identify the lowest or youngest age is 28 and the highest or oldest age is 42. • Step 2: Subtract the maximum value form the minimum value. 42 − 28 = 14 . The range of this data set is 14 years. 4.3 Geometry Geometry is the branch of mathematics that studies properties and relations of points, lines, surfaces, and solids. 4.3.1 Regular vs Irregular Shapes A polygon is a plane figure with at least three straight sides and angles. For example, a triangle (3 sides), rhombus (4 sides), pentagon (5 sides), etc.

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