Data Analysis: Describing Data - Descriptive Statistics Accountability Modules WHAT IT IS situate to Table of Contents Descriptive statistics include the numbers, tables, charts, and graphs used to describe, organize, summarize, and play young selective information. Descriptive statistics atomic number 18 close often used to examine: + interchange t depotency (location) of info, i.e. where entropy tend to fall, as mensurable by the mean, median, and mode. + public moving picture (variability) of information, i.e. how spread out data are, as mensurable by the sectionalization and its square root, the standard deviation. + skew (symmetry) of data, i.e. how concentrated data are at the low or high end of the overcome, as measured by the skew index. + kurtosis (peakedness) of data, i.e. how concentrated data are approximately a single value, as measured by the kurtosis index. Any verbal description of a data set should include examination of the higher up. As a rule, l ooking at central tendency via the mean, median, and mode and scattering via the division or standard deviation is not sufficient. (See the definitions beneath for more details.) DEFINITIONS The following definitions are vital in discernment descriptive statistics: + Variables are quantities or qualities that may assume every ace of a set of values. Variables may be sort as nominated, ordinal, or interval.
Nominal variables use names, categories, or labels for soft values. Typical nominal variables include gender, ethnicity, job title, and so forth. ordinal number variables, like nominal variables, are ca tegorical variables. However, the order or r! ank of the categories is meaningful. For example, round members may be asked to indicate their gaiety with a training score on an ordinal scale ranging from poor to excellent. Such categories could be converted to a numerical scale for further analysis. Interval variables are purely numeric variables. The nominal and ordinal variables noted above are separate since they do not permit making statements about degree, e.g., Person...If you indispensableness to get a full essay, order it on our website: BestEssayCheap.com
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