Data Analysis and Statistics Vocabulary

the average of the numbers: a calculated "central" value of a set of numbers.

• Mode

• Median

• Mean

• Mean Absolute Deviation

The average distance between each data value and the mean of the data set.

• Mean

• Median

• Mode

• Mean Absolute Deviation (MAD)

a sample is collected in such a way that some members of the intended population are less likely to be included than others.

• Statistics

• Biased Sample

• Random Sample

• Sample of the Population

The "middle" of a sorted list of numbers.

• Mean

• Median

• Mode

• Range

The difference between the lowest and highest values.

• Mean

• Median

• Mode

• Range

The number which appears most often in a set of numbers.

• Mean

• Median

• Mode

• Range

A special type of diagram showing Quartiles 1, 2 and 3 (where the data can be split into quarters) in a box, with lines extending to the lowest and highest values

• Box and Whisker Plot

• Lower Quartile

• Upper Quartile

• Interquartile Range

found using medians to divide a data set into quarters. This is the median of the lower half of the values

• Box and Whisker Plot

• Lower Quartile

• Upper Quartile

• Interquartile Range

found using medians to divide a data set into quarters. This is the median of the upper half of the values

• Box and Whisker Plot

• Lower Quartile

• Upper Quartile

• Interquartile Range

Distance between the first and third quartiles of a data set. The box connecting the lower and upper quartiles and median of the data set.

• Box and Whisker Plot

• Upper Quartile

• Lower Quartile

• Interquartile Range