Measures of Variability

Vocabulary

• Variability- describes how data is spread out
• Range: biggest-smallest #'s in data set
• Median: the middle # of the data set - aka. the second quartile
• First Quartile: the median of the lower half of data set
• Third Quartile: the median of the upper half of the data set

61, 66, 68, 92, 90, 54, 51, 62, 66, 75, 66

• order the values from least to greatest
• Identify first and third quartiles
• Create a Box and Whisker Plot with data.
• Be able to interpret data from a Box and Whisker Plot

61, 66, 68, 92, 90, 54, 51, 62, 66, 75, 66

• order the values from least to greatest
• Identify first and third quartiles
• Create a Box and Whisker Plot with data.
• Be able to interpret data from a Box and Whisker Plot

51, 54, 61, 62, 66, 66, 66, 68, 75, 90, 92

33, 11, 7, 14, 19, 19, 30, 25, 13

Interpret a Box-and-Whisker Plot

52, 75, 55, 30, 70, 56, 66

Measures of Variability