SECTION 6B HIGHLIGHTS
Vocabulary: Range, Quartiles, Five Number Summary, Boxplot, Standard deviation
Assignment: Read about Measures of Variation in Section 6B of the
text. Do pp. 399-401
RQ(1-4), BSC(15*,17*,19,20,21,23).
*Use Excel to calculate Standard Deviation
Notes:
Range of a set of data is the difference between the highest and the lowest
data value.
Five Number Summary- The five number summary for a set of data includes the
following:
1. Lowest Score
2. Lower Quartile - The median of the data values in the lower half of the data
set.
3. Median or Middle Quartile - The overall median.
4.Upper Quartile - The median of the data values in the upper half of the data
set.
5. Highest Score.
The five number summary is represented graphically using a box plot. Examples are shown on pages 374 and 375 of the text.
The Standard Deviation is a commonly used measure for the amount of variation or scattering in a set of data.
Skills to be Mastered:
1. The student should be able to find the range for a set of data.
2. The student should be able to find the five number summary for a data
set.
3. The student should be able to create a box-plot from a five number
summary.
4. The student should be able to calculate the Standard Deviation for a
set of data using Excel.