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| A characteristic that varies from one person or thing to another |
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| A nonnumerically valued variable |
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| A numerically valued variable |
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| A quantitative variable whose possible values form a finite (or countably infinite) set of numbers |
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| A quantitative variable whose possible values form some interval of numbers |
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| Information obtained by observing values of a variable |
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| Data obtained by observing values of a qualitative variable |
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| Data obtained by observing values of a quantitative variable |
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| Data obtained by observing values of a descrete variable |
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| Data obtained by observing values of a continuous variable |
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Putting data into groups rather than treating each observation individually
Also one of the most common methods of organizing data |
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| Classes, Frequency, Frequency Distribution, Relative Frequency, Relative-Frequency Distribution, Lower Cutpoint, Upper Cutpoint, Midpoint, Width |
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| Categories for grouping data |
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| The number of observations that fall in a class |
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| A listing of all classes and their frequencies |
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| The ratio of the frequency of a class to the total number of observations |
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| Relative-Frequency Distributions |
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| A listing of all classes and their relative freqiencies |
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| The smallest value that could go in a class |
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| The smallest value that could go in the next higher class. The upper cutpoint is a class is the same as the lower cutpoint of the next higher class |
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| The middle of a class, obtained by taking the average of its lower and upper cutpoints |
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| The difference between the upper and lower cutpoints of a class |
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| A table that provides the classes, frequencies, relative frequencies, and midpoints of a data set |
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| the smallest maturity period |
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| The largest maturity period |
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| When utilizing class limits to depict classes, we use marks instead of midpoints. It is the average of its lower and upper limits |
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| A graph that displays the classes on the horizontal axis and the frequencies of the classes on the vertical axis. The frequency of each class is represented by a vertical bar whose hight is equal to the frequency of the class |
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| Relative-Frequency Histograms |
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| A graph that displays the classes on the horizontal axis and the relative frequencies of the classes on the vertical axis. The relative frequency of each class is represented by a vertical bar whose height is equal to the relative frequency of the class |
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| Another type of graphical display for quantitative data |
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| Disk divided into wedge-shaped pieces that are proportional to the relative frequencies |
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| Like a histogram but they do not touch each other |
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leading digits are stems and final digits are leafs
They can be shaded, ordered, or regular |
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| Distribution of a data set |
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| Is a table, graph, or formula that provides the values of the observations and how often they occur |
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| distribution that has one peak |
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| Population Distribution or Distribution of the variable |
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| the distribution of population data |
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| The distribution of sample data |
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| Cause the bars to be out of correct proportion and creates a misleading impression of the graph. |
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