Measures of center
Another word for mean
What is average?
This shows a distribution of data values on a number line
What is a box plot?
The difference between the greatest data value and the least data value of a data set
What is range?
What is histogram?
Measures of center
What are mean, median, and mode
The value that occurs the most in a data set
What is mode?
The minimum and maximum values in this data set
80, 74, 83, 81, 84, 83, 71, 73, 76, 81, 76
What are 71 and 84?
The difference between the third quartile and the first quartile
Interquartile range (IQR)
What is both?
Measures of Variability
What are interquartile range (IQR) and mean absolute deviation (MAD)
The middle data value when values are ordered from least to greatest
What is median?
What is the first quartile within this data set:
80, 74, 83, 81, 84, 83, 71, 73, 76, 81, 76
What is 74?
This measure of variability tells how far the data are spread out from the mean.
What is Mean absolute deviation (MAD)?
Organized in rows and columns
What is frequency table?
This describes how data values are arranged.
What is data distribution?
The sum of all values of a data set divided by the total number of values in the data set
What is mean?
Median in this data set
80, 74, 83, 81, 84, 83, 71, 73, 76, 81, 76
What is 80?
The distance between each data value and the mean
What is absolute deviation?
Visually compares frequency
What is histogram?
If data are NOT symmetric, use median and
What is interquartile range (IQR)?
What is the mean, median, and mode of this data set:
12,13,14,15,16,17,18,19,20
What is
mean: 144/9=16
median: 16
mode: no mode
To create a box plot, you need 5 values
What is
minimum value maximum value
median first quartile third quartile
This shows a visual representation of the IQR.
What is a box plot?
Numerically compares frequency
What is both?
If data are symmetric, use these two measures.
What are mean and mean absolute deviation (MAD).