Dot Plot and Measures of Center

Each dot represents 1 day. How many days were recorded?

• 9
• 21
• 20
• 105

What is the median of the data?

• 105
• 106
• 104
• 110

What is the mode?

• 88%
• 89%
• 97%
• 91%

Find the medians.
Science: _________ Math: __________ 

•  science: 4.5 h; math: 3 h
•  science: 3 h; math: 4.5 h
•  science: 5 h; math: 5 h
•  science: 3.5 h; math: 4 h

What is the difference between the medians for the two data sets? 

• 0 tickets
• 2 tickets
• 4 tickets
• 6 tickets

What is the range in gas mileage for cars?

• 2
• 3
• 4
• 6

Are these dot plots symmetric?

• Yes
• No

What is the difference between the medians for cars and SUVs?

• 0
• 5
• 7

Compare the centers and spreads. 

•  Math has a higher median (center) and a wider spread.
•  Math has a higher median (center) and a smaller spread.
• Math has a lower median (center) and a smaller spread.
• Math has a lower median (center) and a wider spread.

• The median number of hours Leslie watched television is equal to the median number of

  hours Dixie watched television

• The mode number of hours Dixie watched television is less than the mode number of

  hours Leslie watched television

• Dixie had a greater range of the number of hours watched television than Leslie

• The least number of hours Leslie watched television is equal to the least number of hours

  Dixie watched television