14 terms

Statistical Question

a question that anticipates and accounts for a variety of answers

Mean

the sum of the numbers in a set of data divided by the number of pieces of data; average

Average

the sum of two or more quantities, divided by the number of quantities; mean

Measures of Center

numbers that are used to describe the center of a set of data

Includes: mean, median and mode

Includes: mean, median and mode

Median

value appearing at the center of a sorted version of the list or the mean of the two central values

Mode

number or numbers that occur the most often

Measure of Variation

a measure used to describe the distribution of the data

Quartiles

values that divide the data set into four equal parts

First Quartile

for a data set with median M, the first quartile is the median of the data values less than M

Third Quartile

for a data set with median M, the first quartile is the median of the data values greater than M

Interquartile Range (IQR)

a measure of variation on a set of numerical data, it is the distance between the first and third quartiles of the data set

Range

the difference between the greatest and least data values

Outliers

a value that is much higher or much lower than the other values in a set of data

Mean Absolute Deviation

computed by adding the distances between each data value and then mean, then dividing by the number of data values