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ve number summary
The ve number summary of a data set consists of the minimum, the three quartiles, and the maximum.
model
A mathematical or statistical representation of a problem from science, technology, engineering, work, or everyday life, used to solve problems and make decisions.
negative relationship
A relationship between two numerical variables is negative if an increase in the data for one variable tends to be paired with a decrease in the data for the other variable.
non-statistical question
A non-statistical question is a question which can be answered by a speci c measurement or procedure where no variability is anticipated, for example:
• How high is that building?
• If I run at 2 meters per second, how long will it take me to run 100 meters?
numerical data
Numerical data, also called measurement or quantitative data, are data where the values are numbers, measurements, or quantities. For example, the weights of 10 di erent dogs are numerical data.
outlier
A data value that is unusual in that it di ers quite a bit from the other values in the data set.
positive relationship
A relationship between two numerical variables is positive if an increase in the data for one variable tends to be paired with an increase in the data for the other variable.
relative frequency table
Aversion of a two-way table in which the value in each cell in is divided by the total number of responses in the entire table, or by the total number of responses in a row or a column.
residual
The di erence between the -value for a point in a scatter plot and the value predicted by a linear model.
skewed distribution
A distribution where one side of the distribution has more values farther from the bulk of the data than the other side, so that the mean is not equal to the median.
solution to a system of equations
A coordinate pair that makes both equations in the system true.
Unit 3 Glossary 157