Psy 315 Problem Set 1

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University of Phoenix Material Week One Practice Problems Prepare a written response to the following questions. Chapter 1 12. Explain and give an example for each of the following types of variables: a. Equal interval: An equal-interval can be described as a classification method that divides values into like groups that contain equal ranges of values. For example, the numbers 50, 100, 125, and 175 can be grouped by 50-100 and 125-175 to be equally spaced by 50. b. Rank-order: Rank-order relates to putting things in a sequential arrangement, or in an order of magnitude. A very simple example would be the military’s ranking system. Individuals are ranked by experience and importance. For example, an O3 (Lieutenant) in the Coast Guard out ranks an O1 (Ensign). c. Nominal: Nominal is not a numeric value, but rather the classification of data, For instance, categories such as your name, year in school, what kind of car you drive, etc is a nominal. d. Ratio scale: The ratio scale represents quantities of things, and consists of equal sets. Ratio sets are a lot like the interval scale, except for it cannot include negative numbers. e. Continuous: The definition of continuous in statistics can refer to a line in a graph that does not have any break, interuptions, or irregularities. A good example of continuity is an infinite graph, i.e, a never-ending sequence. f. Discrete: The definition of discrete means that data can only take on certain values. For example, if someone is taking a poll of the number of students in a class, the data has to consist of whole numbers (you cannot have half of a person). 15. Following are the speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon: 30, 36, 42, 36, 30, 52, 36, 34, 36, 33, 30, 32, 35, 32, 37, 34, 36, 31, 35, 20

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