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Unit 1 Vocabulary

Exploring Real-Life Phenomena through Statistics

TermDefinition
Box Plot A visual display of the distribution of data values using the median, quartiles, and extremes of the data set. A box shows the middle 50% of the data.
Categorical Data Categorical variables represent types of data which may be divided into groups. Examples of categorical variables are race, sex, age group, and educational level.
Distribution the action of sharing something out among a number of recipients.
Dot Plot A method of visually displaying a distribution of data values where each data value is shown as a dot or mark above a number line. Also known as a line plot.
Frequency the number of times the data value occurs
Histogram a diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval.
Variability how spread out of closely clustered a set of data is.
Interquartile Range A measure of variation in a set of numerical data, the distance between the first and third quartiles of the data set.
Statistics a branch of applied mathematics that involves the collection, description, analysis, and inference of conclusions from quantitative data.
Maximum Value The largest value taken by the function.
Minimum Value The smallest value taken by the function.
Statistical Question a question that can be answered by collecting data that varies.
Skewed Data data that tends to have a long tail on one side or the other.
Mean The measure of center in a set of numerical data.
Range the difference between the lowest and highest value in a set of data.
Measures of Center A value that attempts to describe a set of data by identifying the central position of the data set.
Outlier a value in a data set that is very different from the other values (usually far from the middle).
Measures of Spread describes how similar or varied the set of observed values are for a particular variable (data item).
Numerical Data The data that is in the form of numbers, and not in any language of descriptive form.
Median A measure of center in a set of numerical data, the value appearing at the center of a sorted version of the list.
Mode The most frequent number-that is, the number that occurs the highest number of times.
Created by: emily.brett
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