10. Describing Data Using IQR and the 5-Point Summary

Quartiles break the data set into _____ equal parts each representing 25% of the data.

• 1

• 2

• 3

• 4

Q2 is the same as the ______

• Mean

• Median

• Mode

• Range

Q1 is the median (middle) of the lower half of the data values.

• True

• False

IQR = Q3 - Q1

• True

• False

What is the median? (a)  

• 62
• 58
• 66
• 60

What is the minimum value?

Mathematical Equivalence

ON

What is the maximum value?

Mathematical Equivalence

ON

What value is the lower quartile (Q1)?

Mathematical Equivalence

ON

What data value is the upper quartile (Q3)?

Mathematical Equivalence

ON

Which class has the higher test score median?  (a)  

• Class #1
• Class # 2 
• The medians are equal
• The median is not shown here.