14 terms

Chapter 11: Statistical Measures

STUDY
PLAY

Terms in this set (...)

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
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