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PLTW Statistics K.T.

Key Terms for 3.5 Statistics

QuestionAnswer
Class Interval A group of values that is used to analyze the distribution of data.
Data Facts and statistics used for reference or analysis.
Data Set A group of individual values or bits of information that are related in some way or have some common characteristic or attribute.
Frequency The rate at which something occurs over a particular period or in a given sample.
Histogram A graph of vertical bars representing the frequency distribution of a set of data.
Mean A measure of center in a set of numerical data, computed by adding the values in a list and then dividing by the number of values in the list.
Median A measure of center in a set of numerical data. The median of a list of values is the value appearing at the center of a sorted version of the list – or the mean of the two central values if the list contains an even number of values.
Mode The value that occurs most frequently in a given data set.
Normal Distribution A function that represents the distribution of variables as a symmetrical bell-shaped graph.
Scatter Plot A graph in the coordinate plane representing a set of bivariate data.
Standard Deviation The distance of a value in a population (or sample) from the mean value of the population (or sample).
Statistics Collection of methods for planning experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data.
Variation A change or slight difference in condition, amount, or level.
Created by: toconnor