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Maths

WALT: interpret a range of statistical graphs

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VIDEO: Understanding Statistical Graphs

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Pie Graph

Miss Va’afusuaga asked the students in Room 2 what winter sport they liked watching best on TV. She recorded answers from 32 students in this pie graph.

  1. What sport did most of the students like watching best?______________�
  2. Which sport did ¼ of the students choose?�___________�
  3. How many students liked watching Netball �best?
    1. 2
    2. 4
    3. 6
    4. 8
    5. 12

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Dot Plot

Two classes in Team 5 graphed how much pocket money each student got. They compared their graphs.

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  1. In which class do students get more pocket money. Refer back to the graphs to support your answer.

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Stem and Leaf Graph

The students in Room 2 measured their heights in �centimetres. Here are there results.

  1. How many students are in Room 2?_____�
  2. Highlight which of these intervals has the �most students in it?
    1. 120 - 129cm
    2. 130 - 139cm
    3. 140 - 149cm
    4. 150 - 159cm�
  3. The students stood in a line from the shortest to tallest.
    • What is the height of the person standing 5th in line? _____cm
    • What is the height of the person standing in the middle of the line?____cm

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Line Graph

This graph shows the weight of Tavita and his brother Vili while they were at Tamaki College.

a) How old was Tavita when he weighed 73 kg? _________

b) How heavy was Vili at 18 years old? __________ kg

c) Draw a circle around the part of the graph that shows when Tavita's weight stayed about the same.

d) The two lines on the graph are moving further apart. What does this tell you?

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Tavita - - - - - - - - - - Vili