Big Ideas Math Chapter 9

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Quartiles

The quartiles of a data set divide the data into four equal parts.

Statistics

The science of collecting, organizing, analyzing, and interpreting data.

Mode

The value/values that occur most often in a data set.

Outlier

A data value that is much greater or much lass than all the others.

Measure of center

A measure that describes the typical value of a data set.

Median

For even numbers the median is the mean of the two middle values, for odd numbers the median is the middle value.

Statistical Question

One for which you do not expect a single answer for.

Mean

The average of a number set.

Mean absolute deviation

The average of how much data values differ from the mean.

Range

The difference between the least value and the greatest value.

Interquartile range

The difference between the third and first quartile

Measure of variation

The measure that describes the distribution of a data set.

First quartile

The median of the lower half.

Third quartile

The median of the upper half.


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