Term
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Definition
| Data in its original form. |
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Term
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Definition
| A raw data value that is placed in a quantitative or a qualitative category. |
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Definition
| The number of data values contained in a specific class. |
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Definition
| The organization of raw data in table form using classes and frequencies. |
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Term
| Categorical frequency distribution |
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Definition
| Used for data that can be placed in specific categories such as nominal- or ordinal-level data |
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Term
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Definition
| The decimal equilateral of a percent. |
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Term
| Grouped frequency distribution |
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Definition
| Data that is grouped into classes that are more than one unit in width. |
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Term
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Definition
| The smallest data value that can be included in the class. |
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Term
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Definition
| The largest data value that can be represented in a class. |
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Term
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Definition
| Numbers that are used to separate the classes so that there are no gaps in the frequency distribution. |
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Term
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Definition
| Found by subtracting the lower (or upper) class limit of one class from the lower (or upper) class limit of the next class. |
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Term
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Definition
| Is obtained by adding the lower and upper boundaries and dividing by two. |
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Term
| Mutually exclusive classes |
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Definition
| Classes that have none overlapping class limits so that the data cannot be placed into two classes. |
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Term
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Definition
| A frequency distribution with an open-ended class. |
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Term
| Cumulative frequency distribution |
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Definition
| A distribution that shows the number of data values less than or equal to a specific value (usually an upper boundary). |
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Term
| Ungrouped frequency distribution |
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Definition
| A frequency distribution that can be constructed using single data values for each class. |
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Term
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Definition
| A graph that displays the data by using contiguous vertical bars of various heights to represent the frequencies of the classes. |
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Term
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Definition
| A graph that displays the data by using lines that connect points plotted for the frequencies at the midpoint of the classes. |
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Term
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Definition
| A graph that represents the cumulative frequencies for the classes in a frequency distribution. |
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Term
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Definition
| A graph where the distributions are using proportions as opposed to raw data. |
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Term
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Definition
| Has a single peak that tapers off at either end. It is approximately symmetric. |
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Term
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Definition
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Term
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Definition
Few data values on the left side and increases as it moves to the right.
A reverse shaped J-distribution is the opposite. |
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Term
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Definition
| Represents the data by using vertical or horizontal bars whose height or lengths represent the frequencies of the data. |
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Term
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Definition
| Used to represent a frequency distribution for a categorical variable and the frequencies are displayed by the heights of vertical bars which are arranged in order from highest to lowest. |
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Term
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Definition
| Represents data that occur over a specific period of time. |
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Term
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Definition
| A circle that is divided into sections or wedges according to a percentage of frequencies in each category of the distribution. |
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Term
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Definition
| A data plot that uses part of the data value as a stem and part of the data value as the leaf to form groups or classes. |
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Term
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Definition
| A graph of order pairs of data values that is used to determine if a relationship exists between the two variables. |
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Term
| Positive linear relationship |
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Definition
| When the points fall approximately in an ascending straight line and both the x and y values increase at the same time. |
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Term
| Negative linear relationship |
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Definition
| When the points fall approximately in a descending straight line from left to right. |
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Term
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Definition
| When the points fall in a curved line. No relationship exists when there is no discernible pattern of the points. |
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