Ch.9 Introduction to Statistics

A measure that describes the distribution of a

data set.

• measure of variation

• mean absolute deviation (MAD)

• measure of center

• statistical question

The science of collecting, organizing, analyzing,

and interpreting data.

• statistical question

• statistics

• quartiles

• first quartile (Q1)

A data value that is much greater or much less

than the other values

• quartiles

• outlier

• statistics

• mode

A measure that describes the typical value of a

data set. Mean, Median, and Mode are measure of this.

• measure of variation

• range (of a data set)

• statistical question

• measure of center

An average of how much data values differ from

the mean.

• mean absolute deviation (MAD)

• statistical question

• first quartile (Q1)

• measure of variation

The difference between the third quartile and the

first quartile of a data set; represents the range of

the middle half of the data.

• third quartile (Q3)

• first quartile (Q1)

• Interquartile Range (IQR)

• range (of a data set)

The difference between the greatest value and the

least value of a data set.

• measure of variation

• range (of a data set)

• Interquartile range (IQR)

• measure of center

middle range of data set.

• mode

• median

• mean

• outlier

The data value or values that occur most often.

• median

• mode

• mean

• range (of a data set)

The quartiles of a data set divide the data into four

equal parts.

• quartiles

• first quartile (Q1)

• third quartile (Q3)

• statistics