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Math 2 - Vocab- MA

Data Analysis

QuestionAnswer
Numbers or facts that describe something, It can be numerical, counted, or descriptive. data
A straight line that best fits the data on the coordinate plane. line of best fit
This a the sum of all the results included in the sample divided by the number of observations. It is the same as the average. mean
Commonly used measures of statistics that describe the center or frequency of a distribution: mean, median, mode. Measures of central tendency
A measurement of the variation of the data. This can include the range, standard deviation, percentiles, quartiles, and interquartile range. measures of spread
The middle term in a set of data. If the data set has an even number of terms the median is the average of the two middle terms. median
This is the most frequently occurring element in a set. mode
This describes the relationship between one set of data that decreases as another set of data increases. Inversely related is a synonym. negative correlation
In a set of data, there is no clear pattern to the points when graphed on a coordinate plane, the correlation of the points is neither positive or negative. no relative coorelation
A continuous distribution that is symmetrical, bell-shaped and whose mean, median, and mode ar equal. The randon variable has an infinite theoretical range. normal distribution
Total data set. population
This describes the relationship between one set of data that increases as another set of data increases. This is synonymous with directly related. positive correlation
This is the difference between the maximumasnd the minimum value in a data set. range
This is part of a population selected to predict information about the population as a whole. sample
A graph that displays a collection of ordered pairs. scatter plot
This measures the deviation between the scores and the mean; it measures how dispersed the data is. The higher this is the more spread out the data is from each other. standard deviation
Created by: Barbara Webb
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