Measure of Center and Variability

It's the middle number in a set of data.

• mean

• median

• mode

• range

It's the number that occurs the most times in a set of data.

• mean

• median

• mode

• range

Which measure of center should you use if there is an outlier in your data?

• mean

• median

What is the mode of the following set of data?

• 23

• 21

• 14

• 25

Which measure of center should you use for the following data distribution?

• mean

• median

Which measure of center should you use if there are no outliers?

• mean

• median

Is there an outlier in the following set of data?

• yes

• no

The double line plot shows the number of students who attended the home games of the baseball team for two recent seasons.  Which of the following statements is NOT true.

• The median attendance for 2009 was less than the median attendance than 2010.

• The attendance for 2010 was more consistent, so the MAD would be smaller than the MAD for 2009.

• The attendance for 2009 was more consistent, so the MAD would be smaller than the MAD for 2010.

• The attendance for 2010 ranged from 20-27.

Which class has the higher test score median? 

• Class #1

• Class # 2 

• The medians are equal

• The median is not shown here. 

Which class was more consistent in their Algebra Scores?

• Class #2

• Class #1

• Both classes had the same consistency.

• 50%